[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Alan Carvalho de Assis]

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Scott Wood]

Alan Carvalho de Assis wrote:
> From 473120de8390abd78014cac9fe0925cb49f57fbe Mon Sep 17 00:00:00 2001
> From: Alan Carvalho de Assis <alan.assis@freescale.com>
> Date: Sun, 5 Oct 2008 19:59:47 -0300
> Subject: [PATCH] iMX31: Add support to copy NAND Flash code to RAM
> 
> This code is executed from internal 2KB NAND Flash Controller RAM buffer
> and will copy the remaining U-Boot code from NAND Flash verifying its
> bad blocks (case it exists).
> 
> Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>
> ---
>  cpu/arm1136/mx31/Makefile             |    2 +
>  cpu/arm1136/mx31/nand_copy.S          |  263 +++++++++++++++++++++++++++++++++
>  include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++

Please use the nand_spl infrastructure to whatever extent is practical.

Does this code really need to be in assembly to fit?

-Scott

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Alan Carvalho de Assis]

Hi Scott,

On Tue, Oct 7, 2008 at 3:03 PM, Scott Wood <scottwood@freescale.com> wrote:
> Alan Carvalho de Assis wrote:
>>
>> From 473120de8390abd78014cac9fe0925cb49f57fbe Mon Sep 17 00:00:00 2001
>> From: Alan Carvalho de Assis <alan.assis@freescale.com>
>> Date: Sun, 5 Oct 2008 19:59:47 -0300
>> Subject: [PATCH] iMX31: Add support to copy NAND Flash code to RAM
>>
>> This code is executed from internal 2KB NAND Flash Controller RAM buffer
>> and will copy the remaining U-Boot code from NAND Flash verifying its
>> bad blocks (case it exists).
>>
>> Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>
>> ---
>>  cpu/arm1136/mx31/Makefile             |    2 +
>>  cpu/arm1136/mx31/nand_copy.S          |  263
>> +++++++++++++++++++++++++++++++++
>>  include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++
>
> Please use the nand_spl infrastructure to whatever extent is practical.
>
> Does this code really need to be in assembly to fit?

I reused the source code from RedBoot. I think using nand_spl is the
best approach, but it will needs more effort to complete.

I am afraid about the 2KB NAND loader limitation, this is too tight to
fill using C code. I will investigate to verify if it is feasible.

Anyway, right now we can have iMX31PDK booting with this code as an
option for users willing to use U-Boot in this board.

> -Scott
>

Best Regards,

Alan

P.S.: I am sending this email again because I sent it erroneously only to Scott

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Alan Carvalho de Assis]

This code is executed from internal 2KB NAND Flash Controller RAM buffer
and will copy the remaining U-Boot code from NAND Flash verifying its
bad blocks (case it exists).

Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>
---
 cpu/arm1136/mx31/Makefile             |    2 +
 cpu/arm1136/mx31/nand_copy.S          |  263 +++++++++++++++++++++++++++++++++
 include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++
 3 files changed, 334 insertions(+), 0 deletions(-)
 create mode 100644 cpu/arm1136/mx31/nand_copy.S

diff --git a/cpu/arm1136/mx31/Makefile b/cpu/arm1136/mx31/Makefile
index b648ffd..0490706 100644
--- a/cpu/arm1136/mx31/Makefile
+++ b/cpu/arm1136/mx31/Makefile
@@ -26,7 +26,9 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(SOC).a

 COBJS	= interrupts.o serial.o generic.o
+SOBJS-$(CONFIG_BOOT_FROM_NAND) = nand_copy.o

+SOBJS	:= $(SOBJS-y)
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))

diff --git a/cpu/arm1136/mx31/nand_copy.S b/cpu/arm1136/mx31/nand_copy.S
new file mode 100644
index 0000000..7a2460c
--- /dev/null
+++ b/cpu/arm1136/mx31/nand_copy.S
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc.
+ *
+ * Alan Carvalho de Assis <alan.assis@freescale.com>
+ * based on iMX31PDK RedBoot_200814 code.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <asm/arch/mx31-regs.h>
+
+.macro do_addr_input
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+.endm   /* do_addr_input */
+
+do_wait_op_done:
+1:	ldrh	r3, [r12, #NFC_CONFIG2_OFF]
+	ands	r3, r3, #NAND_FLASH_CONFIG2_INT_DONE
+	beq	1b
+	bx	lr
+
+nfc_data_output:
+	mov	r3, #(NAND_FLASH_CONFIG1_INT_MSK | NAND_FLASH_CONFIG1_ECC_EN)
+	strh	r3, [r12, #NFC_CONFIG1_OFF]
+	strh	r8, [r12, #NFC_BUF_ADDR_OFF]
+	mov	r3, #FDO_PAGE_SPARE_VAL
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bx	lr
+
+.globl nand_copy
+nand_copy:
+	/* Copy image from flash to SDRAM first */
+	mov	r0, #NFC_BASE_ADDR
+	add	r2, r0, #0x800      /* 2K window */
+	ldr	r1, MXC_UBOOT_ROM_START
+
+1:	ldmia	r0!, {r3-r10}
+	stmia	r1!, {r3-r10}
+	cmp	r0, r2
+	blo	1b
+	/* Jump to SDRAM */
+	ldr	r1, =0x0FFF
+	and	r0, pc, r1     /* offset of pc */
+	ldr	r1, MXC_UBOOT_ROM_START
+	add	r1, r1, #0x10
+	add	pc, r0, r1
+	nop
+	nop
+	nop
+	nop
+
+nand_copy_main:
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands 	r7, r7, #(1 << 30)
+
+	mov	r0, #NAND_FLASH_BOOT
+	ldr	r1, =AVIC_VECTOR0
+	str	r0, [r1]
+	mov	r0, #MXCFIS_NAND
+	ldr	r1, =AVIC_VECTOR1
+	str	r0, [r1]
+
+	mov	r0, #NFC_BASE_ADDR /* r0: nfc base. Reloaded after each page copying */
+	mov	r1, #0x800       /* r1: starting flash addr to be copied.
Updated constantly */
+	add	r2, r0, #0x800   /* r2: end of 3rd RAM buf. Doesn't change */
+	addeq	r2, r0, #0x200   /* r2: end of 1st RAM buf. Doesn't change
(only set for small page NAND) */
+	add	r12, r0, #0xE00  /* r12: NFC register base. Doesn't change */
+	ldr	r11, MXC_UBOOT_ROM_START
+	add	r13, r11, #0x40000 /* r13: end of SDRAM address for copying.
Doesn't change */
+	add	r11, r11, r1     /* r11: starting SDRAM address for copying.
Updated constantly */
+
+	/* unlock internal buffer */
+	mov	r3, #0x2
+	strh	r3, [r12, #0xA]
+
+nfc_read_page:
+	mov	r3, #0x0
+	strh	r3, [r12, #NFC_FLASH_CMD_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FCMD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands	r7, r7, #(1 << 30)
+	bne	nfc_addr_ops_2kb
+
+	/* 1st addr cycle */
+	mov	r3, r1
+	do_addr_input
+	/* 1st addr cycle */
+	mov	r3, r1, lsr #9
+	do_addr_input
+	/* 1st addr cycle */
+	mov	r3, r1, lsr #17
+	do_addr_input
+	/* 1st addr cycle */
+	mov	r3, r1, lsr #25
+	do_addr_input
+	b	end_of_nfc_addr_ops
+
+nfc_addr_ops_2kb:
+	/* 1st addr cycle */
+	mov	r3, #0
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+	mov	r3, #0
+	/* 2nd addr cycle */
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+	mov	r3, r1, lsr #11
+	/* 3rd addr cycle */
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+	mov	r3, r1, lsr #19
+	/* 4th addr cycle */
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+	mov	r3, r1, lsr #27
+	/* 5th addr cycle */
+	and	r3, r3, #0xFF
+	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+
+	mov	r3, #0x30
+	strh	r3, [r12, #NFC_FLASH_CMD_OFF]
+	mov	r3, #NAND_FLASH_CONFIG2_FCMD_EN
+	strh	r3, [r12, #NFC_CONFIG2_OFF]
+	bl	do_wait_op_done
+
+end_of_nfc_addr_ops:
+	mov	r8, #0
+	bl	nfc_data_output
+	bl	do_wait_op_done
+
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands	r7, r7, #(1 << 30)
+	beq	nfc_addr_data_output_done_512
+
+	/* For 2K page - 2nd 512 */
+	mov	r8, #1
+	bl	nfc_data_output
+	bl	do_wait_op_done
+
+	/* 3rd 512 */
+	mov	r8, #2
+	bl	nfc_data_output
+	bl	do_wait_op_done
+
+	/* 4th 512 */
+	mov	r8, #3
+	bl	nfc_data_output
+	bl	do_wait_op_done
+
+	/* check for bad block */
+	mov	r3, r1, lsl #(32-17)    /* get rid of block number */
+	cmp	r3, #(0x800 << (32-17)) /* check if not page 0 or 1 */
+	b	nfc_addr_data_output_done
+
+nfc_addr_data_output_done_512:
+	/* check for bad block */
+	mov r3, r1, lsl #(32-5-9)    /* get rid of block number */
+	cmp r3, #(512 << (32-5-9))   /* check if not page 0 or 1 */
+
+nfc_addr_data_output_done:
+	bhi	copy_good_blk
+	add	r4, r0, #0x800  /* r3 -> spare area buf 0 */
+	ldrh	r4, [r4, #0x4]
+	and	r4, r4, #0xFF00
+	cmp	r4, #0xFF00
+	beq	copy_good_blk
+	/* really sucks. Bad block!!!! */
+	cmp	r3, #0x0
+	beq	skip_bad_block
+
+	/* even suckier since we already read the first page! */
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands	r7, r7, #(1 << 30)
+
+	subeq	r11, r11, #512 /* rewind 1 page for the sdram pointer */
+	subeq	r1, r1, #512   /* rewind 1 page for the flash pointer */
+
+	/* for 2k page */
+	subne	r11, r11, #0x800  /* rewind 1 page for the sdram pointer */
+	subne	r1, r1, #0x800    /* rewind 1 page for the flash pointer */
+
+skip_bad_block:
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands	r7, r7, #(1 << 30)
+
+	addeq	r1, r1, #(32*512)
+	addne	r1, r1, #(64*2048)
+	b	nfc_read_page
+
+copy_good_blk:
+	/* copying page */
+1:	ldmia	r0!, {r3-r10}
+	stmia	r11!, {r3-r10}
+	cmp	r0, r2
+	blo	1b
+	cmp	r11, r13
+	bge	nand_copy_main_done
+	/* Check if x16/2kb page */
+	ldr	r7, =CCM_BASE
+	ldr	r7, [r7, #0xC]
+	ands	r7, r7, #(1 << 30)
+
+	addeq	r1, r1, #0x200
+	addne	r1, r1, #0x800
+	mov	r0, #NFC_BASE_ADDR
+	b	nfc_read_page
+
+nand_copy_main_done:
+	/* Restore stack pointer since sp has been re-used in this file */
+	ldr	sp, =CFG_INTERNAL_SRAM_STACK
+	/* Restore return address and return to caller */
+	ldr	lr, [sp]
+	bx	lr
+
+MXC_UBOOT_ROM_START:	.word	0x87F00000
+UBOOT_IMAGE_SIZE:	.word	0x40000
+
diff --git a/include/asm-arm/arch-mx31/mx31-regs.h
b/include/asm-arm/arch-mx31/mx31-regs.h
index b04a718..1c5c121 100644
--- a/include/asm-arm/arch-mx31/mx31-regs.h
+++ b/include/asm-arm/arch-mx31/mx31-regs.h
@@ -84,8 +84,14 @@
 #define IPU_CONF_IC_EN		(1<<1)
 #define IPU_CONF_SCI_EN		(1<<0)

+#define ARM_PPMRR		0x40000015
+
 #define WDOG_BASE		0x53FDC000

+#define AVIC_BASE		0x68000000
+#define AVIC_VECTOR0		(AVIC_BASE + 0x100)
+#define AVIC_VECTOR1		(AVIC_BASE + 0x104)
+
 /*
  * Signal Multiplexing (IOMUX)
  */
@@ -168,4 +174,67 @@
 #define CS5_BASE	0xB6000000
 #define PCMCIA_MEM_BASE	0xC0000000

+/*
+ * NAND controller
+ */
+#define NFC_BASE_ADDR	0xB8000000
+#define NFC_REGS	(NFC_BASE_ADDR + 0xE00)
+
+/*
+ * Addresses for NFC registers
+ */
+#define NFC_BUF_SIZE_OFF	0
+#define NFC_BUF_SIZE		(*((volatile u16 *)(NFC_REGS + NFC_BUF_SIZE_OFF)))
+#define NFC_BUF_ADDR_OFF	0x04
+#define NFC_BUF_ADDR		(*((volatile u16 *)(NFC_REGS + NFC_BUF_ADDR_OFF)))
+#define NFC_FLASH_ADDR_OFF	0x06
+#define NFC_FLASH_ADDR		(*((volatile u16 *)(NFC_REGS + NFC_FLASH_ADDR_OFF)))
+#define NFC_FLASH_CMD_OFF	0x08
+#define NFC_FLASH_CMD		(*((volatile u16 *)(NFC_REGS + NFC_FLASH_CMD_OFF)))
+#define NFC_CONFIG_OFF		0x0A
+#define NFC_CONFIG		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG_OFF)))
+#define NFC_ECC_RSLT_OFF	0x0C
+#define NFC_ECC_STATUS_RESULT	(*((volatile u16 *)(NFC_REGS +
NFC_ECC_RSLT_OFF)))
+#define NFC_RSLTMAIN_AREA_OFF	0x0E
+#define NFC_RSLTMAIN_AREA	(*((volatile u16 *)(NFC_REGS +
NFC_RSLTMAIN_AREA_OFF)))
+#define NFC_RSLTSPARE_AREA_OFF	0x10
+#define NFC_RSLTSPARE_AREA	(*((volatile u16 *)(NFC_REGS +
NFC_RSLTSPARE_AREA_OFF)))
+#define NFC_WRPROT_OFF		0x12
+#define NFC_WRPROT		(*((volatile u16 *)(NFC_REGS + NFC_WRPROT_OFF)))
+#define NFC_UNLCKSTART_BLK_OFF	0x14
+#define NFC_UNLCKSTART_BLKADDR	(*((volatile u16 *)(NFC_REGS +
NFC_UNLOCKSTART_BLK_OFF)))
+#define NFC_UNLCKEND_BLK_OFF	0x16
+#define NFC_UNLCKEND_BLKADDR	(*((volatile u16 *)(NFC_REGS +
NFC_UNLOCKEND_BLK_OFF)))
+#define NFC_NF_WRPRST_OFF	0x18
+#define NFC_NF_WRPRST		(*((volatile u16 *)(NFC_REGS + NFC_NF_WRPRST_OFF)))
+#define NFC_CONFIG1_OFF	0x1A
+#define NFC_CONFIG1		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG1_OFF)))
+#define NFC_CONFIG2_OFF	0x1C
+#define NFC_CONFIG2		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG2_OFF)))
+
+#define RAM_BUFFER_ADDRESS_RBA_3	0x3
+#define NFC_BUFSIZE_1KB		0x0
+#define NFC_BUFSIZE_2KB		0x1
+#define NFC_CONFIGURATION_UNLOCKED	0x2
+#define ECC_STATUS_RESULT_NO_ERR	0x0
+#define ECC_STATUS_RESULT_1BIT_ERR	0x1
+#define ECC_STATUS_RESULT_2BIT_ERR	0x2
+#define NF_WR_PROT_UNLOCK		0x4
+#define NAND_FLASH_CONFIG1_FORCE_CE	(1 << 7)
+#define NAND_FLASH_CONFIG1_RST		(1 << 6)
+#define NAND_FLASH_CONFIG1_BIG		(1 << 5)
+#define NAND_FLASH_CONFIG1_INT_MSK	(1 << 4)
+#define NAND_FLASH_CONFIG1_ECC_EN	(1 << 3)
+#define NAND_FLASH_CONFIG1_SP_EN	(1 << 2)
+#define NAND_FLASH_CONFIG2_INT_DONE	(1 << 15)
+#define NAND_FLASH_CONFIG2_FDO_PAGE	(0 << 3)
+#define NAND_FLASH_CONFIG2_FDO_ID	(2 << 3)
+#define NAND_FLASH_CONFIG2_FDO_STATUS	(4 << 3)
+#define NAND_FLASH_CONFIG2_FDI_EN	(1 << 2)
+#define NAND_FLASH_CONFIG2_FADD_EN	(1 << 1)
+#define NAND_FLASH_CONFIG2_FCMD_EN	(1 << 0)
+#define FDO_PAGE_SPARE_VAL		0x8
+#define NAND_FLASH_BOOT		0x10000000
+#define MXCFIS_NAND			0x10000000
+
 #endif /* __ASM_ARCH_MX31_REGS_H */
-- 
1.5.4.3

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Guennadi Liakhovetski]

On Thu, 23 Oct 2008, Alan Carvalho de Assis wrote:

> This code is executed from internal 2KB NAND Flash Controller RAM buffer
> and will copy the remaining U-Boot code from NAND Flash verifying its
> bad blocks (case it exists).
> 
> Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>

Last time Scott Wood suggested to use nand_spl you replied "I think using 
nand_spl is the best approach, but it will needs more effort to complete." 
and "Anyway, right now we can have iMX31PDK booting with this code as an
option for users willing to use U-Boot in this board." So, what's the 
status of this effort? If this your new submission, which still doesn't 
use nand_spl is not really targeted for upstream merge, I think, it would 
be better not to mark these mails "PATCH". Or have I missed anything?

Thanks
Guennadi

> ---
>  cpu/arm1136/mx31/Makefile             |    2 +
>  cpu/arm1136/mx31/nand_copy.S          |  263 +++++++++++++++++++++++++++++++++
>  include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++
>  3 files changed, 334 insertions(+), 0 deletions(-)
>  create mode 100644 cpu/arm1136/mx31/nand_copy.S
> 
> diff --git a/cpu/arm1136/mx31/Makefile b/cpu/arm1136/mx31/Makefile
> index b648ffd..0490706 100644
> --- a/cpu/arm1136/mx31/Makefile
> +++ b/cpu/arm1136/mx31/Makefile
> @@ -26,7 +26,9 @@ include $(TOPDIR)/config.mk
>  LIB	= $(obj)lib$(SOC).a
> 
>  COBJS	= interrupts.o serial.o generic.o
> +SOBJS-$(CONFIG_BOOT_FROM_NAND) = nand_copy.o
> 
> +SOBJS	:= $(SOBJS-y)
>  SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
>  OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS))
> 
> diff --git a/cpu/arm1136/mx31/nand_copy.S b/cpu/arm1136/mx31/nand_copy.S
> new file mode 100644
> index 0000000..7a2460c
> --- /dev/null
> +++ b/cpu/arm1136/mx31/nand_copy.S
> @@ -0,0 +1,263 @@
> +/*
> + * Copyright (C) 2008 Freescale Semiconductor, Inc.
> + *
> + * Alan Carvalho de Assis <alan.assis@freescale.com>
> + * based on iMX31PDK RedBoot_200814 code.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
> + * MA 02111-1307 USA
> + */
> +
> +#include <config.h>
> +#include <asm/arch/mx31-regs.h>
> +
> +.macro do_addr_input
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +.endm   /* do_addr_input */
> +
> +do_wait_op_done:
> +1:	ldrh	r3, [r12, #NFC_CONFIG2_OFF]
> +	ands	r3, r3, #NAND_FLASH_CONFIG2_INT_DONE
> +	beq	1b
> +	bx	lr
> +
> +nfc_data_output:
> +	mov	r3, #(NAND_FLASH_CONFIG1_INT_MSK | NAND_FLASH_CONFIG1_ECC_EN)
> +	strh	r3, [r12, #NFC_CONFIG1_OFF]
> +	strh	r8, [r12, #NFC_BUF_ADDR_OFF]
> +	mov	r3, #FDO_PAGE_SPARE_VAL
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bx	lr
> +
> +.globl nand_copy
> +nand_copy:
> +	/* Copy image from flash to SDRAM first */
> +	mov	r0, #NFC_BASE_ADDR
> +	add	r2, r0, #0x800      /* 2K window */
> +	ldr	r1, MXC_UBOOT_ROM_START
> +
> +1:	ldmia	r0!, {r3-r10}
> +	stmia	r1!, {r3-r10}
> +	cmp	r0, r2
> +	blo	1b
> +	/* Jump to SDRAM */
> +	ldr	r1, =0x0FFF
> +	and	r0, pc, r1     /* offset of pc */
> +	ldr	r1, MXC_UBOOT_ROM_START
> +	add	r1, r1, #0x10
> +	add	pc, r0, r1
> +	nop
> +	nop
> +	nop
> +	nop
> +
> +nand_copy_main:
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands 	r7, r7, #(1 << 30)
> +
> +	mov	r0, #NAND_FLASH_BOOT
> +	ldr	r1, =AVIC_VECTOR0
> +	str	r0, [r1]
> +	mov	r0, #MXCFIS_NAND
> +	ldr	r1, =AVIC_VECTOR1
> +	str	r0, [r1]
> +
> +	mov	r0, #NFC_BASE_ADDR /* r0: nfc base. Reloaded after each page copying */
> +	mov	r1, #0x800       /* r1: starting flash addr to be copied.
> Updated constantly */
> +	add	r2, r0, #0x800   /* r2: end of 3rd RAM buf. Doesn't change */
> +	addeq	r2, r0, #0x200   /* r2: end of 1st RAM buf. Doesn't change
> (only set for small page NAND) */
> +	add	r12, r0, #0xE00  /* r12: NFC register base. Doesn't change */
> +	ldr	r11, MXC_UBOOT_ROM_START
> +	add	r13, r11, #0x40000 /* r13: end of SDRAM address for copying.
> Doesn't change */
> +	add	r11, r11, r1     /* r11: starting SDRAM address for copying.
> Updated constantly */
> +
> +	/* unlock internal buffer */
> +	mov	r3, #0x2
> +	strh	r3, [r12, #0xA]
> +
> +nfc_read_page:
> +	mov	r3, #0x0
> +	strh	r3, [r12, #NFC_FLASH_CMD_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FCMD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands	r7, r7, #(1 << 30)
> +	bne	nfc_addr_ops_2kb
> +
> +	/* 1st addr cycle */
> +	mov	r3, r1
> +	do_addr_input
> +	/* 1st addr cycle */
> +	mov	r3, r1, lsr #9
> +	do_addr_input
> +	/* 1st addr cycle */
> +	mov	r3, r1, lsr #17
> +	do_addr_input
> +	/* 1st addr cycle */
> +	mov	r3, r1, lsr #25
> +	do_addr_input
> +	b	end_of_nfc_addr_ops
> +
> +nfc_addr_ops_2kb:
> +	/* 1st addr cycle */
> +	mov	r3, #0
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +	mov	r3, #0
> +	/* 2nd addr cycle */
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +	mov	r3, r1, lsr #11
> +	/* 3rd addr cycle */
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +	mov	r3, r1, lsr #19
> +	/* 4th addr cycle */
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +	mov	r3, r1, lsr #27
> +	/* 5th addr cycle */
> +	and	r3, r3, #0xFF
> +	strh	r3, [r12, #NFC_FLASH_ADDR_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FADD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +
> +	mov	r3, #0x30
> +	strh	r3, [r12, #NFC_FLASH_CMD_OFF]
> +	mov	r3, #NAND_FLASH_CONFIG2_FCMD_EN
> +	strh	r3, [r12, #NFC_CONFIG2_OFF]
> +	bl	do_wait_op_done
> +
> +end_of_nfc_addr_ops:
> +	mov	r8, #0
> +	bl	nfc_data_output
> +	bl	do_wait_op_done
> +
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands	r7, r7, #(1 << 30)
> +	beq	nfc_addr_data_output_done_512
> +
> +	/* For 2K page - 2nd 512 */
> +	mov	r8, #1
> +	bl	nfc_data_output
> +	bl	do_wait_op_done
> +
> +	/* 3rd 512 */
> +	mov	r8, #2
> +	bl	nfc_data_output
> +	bl	do_wait_op_done
> +
> +	/* 4th 512 */
> +	mov	r8, #3
> +	bl	nfc_data_output
> +	bl	do_wait_op_done
> +
> +	/* check for bad block */
> +	mov	r3, r1, lsl #(32-17)    /* get rid of block number */
> +	cmp	r3, #(0x800 << (32-17)) /* check if not page 0 or 1 */
> +	b	nfc_addr_data_output_done
> +
> +nfc_addr_data_output_done_512:
> +	/* check for bad block */
> +	mov r3, r1, lsl #(32-5-9)    /* get rid of block number */
> +	cmp r3, #(512 << (32-5-9))   /* check if not page 0 or 1 */
> +
> +nfc_addr_data_output_done:
> +	bhi	copy_good_blk
> +	add	r4, r0, #0x800  /* r3 -> spare area buf 0 */
> +	ldrh	r4, [r4, #0x4]
> +	and	r4, r4, #0xFF00
> +	cmp	r4, #0xFF00
> +	beq	copy_good_blk
> +	/* really sucks. Bad block!!!! */
> +	cmp	r3, #0x0
> +	beq	skip_bad_block
> +
> +	/* even suckier since we already read the first page! */
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands	r7, r7, #(1 << 30)
> +
> +	subeq	r11, r11, #512 /* rewind 1 page for the sdram pointer */
> +	subeq	r1, r1, #512   /* rewind 1 page for the flash pointer */
> +
> +	/* for 2k page */
> +	subne	r11, r11, #0x800  /* rewind 1 page for the sdram pointer */
> +	subne	r1, r1, #0x800    /* rewind 1 page for the flash pointer */
> +
> +skip_bad_block:
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands	r7, r7, #(1 << 30)
> +
> +	addeq	r1, r1, #(32*512)
> +	addne	r1, r1, #(64*2048)
> +	b	nfc_read_page
> +
> +copy_good_blk:
> +	/* copying page */
> +1:	ldmia	r0!, {r3-r10}
> +	stmia	r11!, {r3-r10}
> +	cmp	r0, r2
> +	blo	1b
> +	cmp	r11, r13
> +	bge	nand_copy_main_done
> +	/* Check if x16/2kb page */
> +	ldr	r7, =CCM_BASE
> +	ldr	r7, [r7, #0xC]
> +	ands	r7, r7, #(1 << 30)
> +
> +	addeq	r1, r1, #0x200
> +	addne	r1, r1, #0x800
> +	mov	r0, #NFC_BASE_ADDR
> +	b	nfc_read_page
> +
> +nand_copy_main_done:
> +	/* Restore stack pointer since sp has been re-used in this file */
> +	ldr	sp, =CFG_INTERNAL_SRAM_STACK
> +	/* Restore return address and return to caller */
> +	ldr	lr, [sp]
> +	bx	lr
> +
> +MXC_UBOOT_ROM_START:	.word	0x87F00000
> +UBOOT_IMAGE_SIZE:	.word	0x40000
> +
> diff --git a/include/asm-arm/arch-mx31/mx31-regs.h
> b/include/asm-arm/arch-mx31/mx31-regs.h
> index b04a718..1c5c121 100644
> --- a/include/asm-arm/arch-mx31/mx31-regs.h
> +++ b/include/asm-arm/arch-mx31/mx31-regs.h
> @@ -84,8 +84,14 @@
>  #define IPU_CONF_IC_EN		(1<<1)
>  #define IPU_CONF_SCI_EN		(1<<0)
> 
> +#define ARM_PPMRR		0x40000015
> +
>  #define WDOG_BASE		0x53FDC000
> 
> +#define AVIC_BASE		0x68000000
> +#define AVIC_VECTOR0		(AVIC_BASE + 0x100)
> +#define AVIC_VECTOR1		(AVIC_BASE + 0x104)
> +
>  /*
>   * Signal Multiplexing (IOMUX)
>   */
> @@ -168,4 +174,67 @@
>  #define CS5_BASE	0xB6000000
>  #define PCMCIA_MEM_BASE	0xC0000000
> 
> +/*
> + * NAND controller
> + */
> +#define NFC_BASE_ADDR	0xB8000000
> +#define NFC_REGS	(NFC_BASE_ADDR + 0xE00)
> +
> +/*
> + * Addresses for NFC registers
> + */
> +#define NFC_BUF_SIZE_OFF	0
> +#define NFC_BUF_SIZE		(*((volatile u16 *)(NFC_REGS + NFC_BUF_SIZE_OFF)))
> +#define NFC_BUF_ADDR_OFF	0x04
> +#define NFC_BUF_ADDR		(*((volatile u16 *)(NFC_REGS + NFC_BUF_ADDR_OFF)))
> +#define NFC_FLASH_ADDR_OFF	0x06
> +#define NFC_FLASH_ADDR		(*((volatile u16 *)(NFC_REGS + NFC_FLASH_ADDR_OFF)))
> +#define NFC_FLASH_CMD_OFF	0x08
> +#define NFC_FLASH_CMD		(*((volatile u16 *)(NFC_REGS + NFC_FLASH_CMD_OFF)))
> +#define NFC_CONFIG_OFF		0x0A
> +#define NFC_CONFIG		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG_OFF)))
> +#define NFC_ECC_RSLT_OFF	0x0C
> +#define NFC_ECC_STATUS_RESULT	(*((volatile u16 *)(NFC_REGS +
> NFC_ECC_RSLT_OFF)))
> +#define NFC_RSLTMAIN_AREA_OFF	0x0E
> +#define NFC_RSLTMAIN_AREA	(*((volatile u16 *)(NFC_REGS +
> NFC_RSLTMAIN_AREA_OFF)))
> +#define NFC_RSLTSPARE_AREA_OFF	0x10
> +#define NFC_RSLTSPARE_AREA	(*((volatile u16 *)(NFC_REGS +
> NFC_RSLTSPARE_AREA_OFF)))
> +#define NFC_WRPROT_OFF		0x12
> +#define NFC_WRPROT		(*((volatile u16 *)(NFC_REGS + NFC_WRPROT_OFF)))
> +#define NFC_UNLCKSTART_BLK_OFF	0x14
> +#define NFC_UNLCKSTART_BLKADDR	(*((volatile u16 *)(NFC_REGS +
> NFC_UNLOCKSTART_BLK_OFF)))
> +#define NFC_UNLCKEND_BLK_OFF	0x16
> +#define NFC_UNLCKEND_BLKADDR	(*((volatile u16 *)(NFC_REGS +
> NFC_UNLOCKEND_BLK_OFF)))
> +#define NFC_NF_WRPRST_OFF	0x18
> +#define NFC_NF_WRPRST		(*((volatile u16 *)(NFC_REGS + NFC_NF_WRPRST_OFF)))
> +#define NFC_CONFIG1_OFF	0x1A
> +#define NFC_CONFIG1		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG1_OFF)))
> +#define NFC_CONFIG2_OFF	0x1C
> +#define NFC_CONFIG2		(*((volatile u16 *)(NFC_REGS + NFC_CONFIG2_OFF)))
> +
> +#define RAM_BUFFER_ADDRESS_RBA_3	0x3
> +#define NFC_BUFSIZE_1KB		0x0
> +#define NFC_BUFSIZE_2KB		0x1
> +#define NFC_CONFIGURATION_UNLOCKED	0x2
> +#define ECC_STATUS_RESULT_NO_ERR	0x0
> +#define ECC_STATUS_RESULT_1BIT_ERR	0x1
> +#define ECC_STATUS_RESULT_2BIT_ERR	0x2
> +#define NF_WR_PROT_UNLOCK		0x4
> +#define NAND_FLASH_CONFIG1_FORCE_CE	(1 << 7)
> +#define NAND_FLASH_CONFIG1_RST		(1 << 6)
> +#define NAND_FLASH_CONFIG1_BIG		(1 << 5)
> +#define NAND_FLASH_CONFIG1_INT_MSK	(1 << 4)
> +#define NAND_FLASH_CONFIG1_ECC_EN	(1 << 3)
> +#define NAND_FLASH_CONFIG1_SP_EN	(1 << 2)
> +#define NAND_FLASH_CONFIG2_INT_DONE	(1 << 15)
> +#define NAND_FLASH_CONFIG2_FDO_PAGE	(0 << 3)
> +#define NAND_FLASH_CONFIG2_FDO_ID	(2 << 3)
> +#define NAND_FLASH_CONFIG2_FDO_STATUS	(4 << 3)
> +#define NAND_FLASH_CONFIG2_FDI_EN	(1 << 2)
> +#define NAND_FLASH_CONFIG2_FADD_EN	(1 << 1)
> +#define NAND_FLASH_CONFIG2_FCMD_EN	(1 << 0)
> +#define FDO_PAGE_SPARE_VAL		0x8
> +#define NAND_FLASH_BOOT		0x10000000
> +#define MXCFIS_NAND			0x10000000
> +
>  #endif /* __ASM_ARCH_MX31_REGS_H */
> -- 
> 1.5.4.3
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
> 

---
Guennadi Liakhovetski, Ph.D.

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Alan Carvalho de Assis]

Hi Guennadi,

On Thu, Oct 23, 2008 at 4:10 PM, Guennadi Liakhovetski <lg@denx.de> wrote:
>
> Last time Scott Wood suggested to use nand_spl you replied "I think using
> nand_spl is the best approach, but it will needs more effort to complete."
> and "Anyway, right now we can have iMX31PDK booting with this code as an
> option for users willing to use U-Boot in this board." So, what's the
> status of this effort? If this your new submission, which still doesn't
> use nand_spl is not really targeted for upstream merge, I think, it would
> be better not to mark these mails "PATCH". Or have I missed anything?
>

This patch is just a rebase of previous patch, to be merged on
u-boot-arm/master repository.
I don't have nand_spl working until now.

I am new sending patches to u-boot mailing list. So what is the
problem when calling it of "PATCH"? Please, let me know about my
mistake, can you explain about it?

> Thanks
> Guennadi
>

Best Regards,

Alan

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Guennadi Liakhovetski]

On Thu, 23 Oct 2008, Alan Carvalho de Assis wrote:

> Hi Guennadi,
> 
> On Thu, Oct 23, 2008 at 4:10 PM, Guennadi Liakhovetski <lg@denx.de> wrote:
> >
> > Last time Scott Wood suggested to use nand_spl you replied "I think using
> > nand_spl is the best approach, but it will needs more effort to complete."
> > and "Anyway, right now we can have iMX31PDK booting with this code as an
> > option for users willing to use U-Boot in this board." So, what's the
> > status of this effort? If this your new submission, which still doesn't
> > use nand_spl is not really targeted for upstream merge, I think, it would
> > be better not to mark these mails "PATCH". Or have I missed anything?
> >
> 
> This patch is just a rebase of previous patch, to be merged on
> u-boot-arm/master repository.
> I don't have nand_spl working until now.
> 
> I am new sending patches to u-boot mailing list. So what is the
> problem when calling it of "PATCH"? Please, let me know about my
> mistake, can you explain about it?

My understanding was, that the patch in this form, i.e., not using 
nand_spl should _not_ be accepted in the mainline and you sent it to the 
list just as a FYI for users willing to use your solution. That's why I 
suggested not to mark it as a "PATCH." I haven't followed discussions of 
your previous submissions of this patch very closely, so I might have 
missed something, but I would agree with Scott and wait until a nand_spl 
version of this patch appears, and _not_ apply this patch in its present 
form.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Wolfgang Denk]

Dear Alan,

In message <37367b3a0810231758y5a3ad19do42e40fbf5128f0@mail.gmail.com> you wrote:
> 
> > Last time Scott Wood suggested to use nand_spl you replied "I think using
> > nand_spl is the best approach, but it will needs more effort to complete."
> > and "Anyway, right now we can have iMX31PDK booting with this code as an
> > option for users willing to use U-Boot in this board." So, what's the
> > status of this effort? If this your new submission, which still doesn't
> > use nand_spl is not really targeted for upstream merge, I think, it would
> > be better not to mark these mails "PATCH". Or have I missed anything?
> >
> 
> This patch is just a rebase of previous patch, to be merged on
> u-boot-arm/master repository.

It will not be merged to arm/master ...

> I don't have nand_spl working until now.

...because we are waiting for nand_spl code.

> I am new sending patches to u-boot mailing list. So what is the
> problem when calling it of "PATCH"? Please, let me know about my
> mistake, can you explain about it?

The problem is that we told you we will only add code that fits intop
the existing framework, i. e. nand_spl

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
As long as we're going to reinvent the wheel again, we might as  well
try making it round this time.                        - Mike Dennison

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Magnus Lilja]

2008/10/24 Wolfgang Denk <wd@denx.de>:
> Dear Alan,
>
> In message <37367b3a0810231758y5a3ad19do42e40fbf5128f0@mail.gmail.com> you wrote:
>>
>> > Last time Scott Wood suggested to use nand_spl you replied "I think using
>> > nand_spl is the best approach, but it will needs more effort to complete."
>> > and "Anyway, right now we can have iMX31PDK booting with this code as an
>> > option for users willing to use U-Boot in this board." So, what's the
>> > status of this effort? If this your new submission, which still doesn't
>> > use nand_spl is not really targeted for upstream merge, I think, it would
>> > be better not to mark these mails "PATCH". Or have I missed anything?
>> >
>>
>> This patch is just a rebase of previous patch, to be merged on
>> u-boot-arm/master repository.
>
> It will not be merged to arm/master ...
>
>> I don't have nand_spl working until now.
>
> ...because we are waiting for nand_spl code.
>
>> I am new sending patches to u-boot mailing list. So what is the
>> problem when calling it of "PATCH"? Please, let me know about my
>> mistake, can you explain about it?
>
> The problem is that we told you we will only add code that fits intop
> the existing framework, i. e. nand_spl

Where can one find developer documentation for nand_spl? Also, is
there any ARM board supporting this already?

The nand_spl for the i.MX31 has to fit within 2048 bytes, along with
some of the usual low_levelinit.S stuff.

/Magnus

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Guennadi Liakhovetski]

On Fri, 24 Oct 2008, Magnus Lilja wrote:

> Where can one find developer documentation for nand_spl?

doc/README.nand-boot-ppc440

> Also, is there any ARM board supporting this already?

nand_spl/board/samsung/smdk6400/

> The nand_spl for the i.MX31 has to fit within 2048 bytes, along with
> some of the usual low_levelinit.S stuff.

src/u-boot$ ls -l nand_spl/u-boot-spl.bin
-rwxrwxr-x 1 ***** ***** 2840 2008-10-23 09:22 nand_spl/u-boot-spl.bin

So, you "just" need to reduce it by about 30%:-)

Also, for anyone implementing a new nand_spl board, please, change the 
SPL-image name from nand_spl/u-boot-spl-16k.bin to something more 
flexible:-)

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Alan Carvalho de Assis]

Hi Guennadi,

On Fri, Oct 24, 2008 at 4:57 AM, Guennadi Liakhovetski <lg@denx.de> wrote:
> On Fri, 24 Oct 2008, Magnus Lilja wrote:
>
>> Where can one find developer documentation for nand_spl?
>
> doc/README.nand-boot-ppc440
>
>> Also, is there any ARM board supporting this already?
>
> nand_spl/board/samsung/smdk6400/
>
>> The nand_spl for the i.MX31 has to fit within 2048 bytes, along with
>> some of the usual low_levelinit.S stuff.
>
> src/u-boot$ ls -l nand_spl/u-boot-spl.bin
> -rwxrwxr-x 1 ***** ***** 2840 2008-10-23 09:22 nand_spl/u-boot-spl.bin
>
> So, you "just" need to reduce it by about 30%:-)
>
> Also, for anyone implementing a new nand_spl board, please, change the
> SPL-image name from nand_spl/u-boot-spl-16k.bin to something more
> flexible:-)
>

Thank you very much! I found your explanation very useful.
Sorry about my mistake. Really is better get the right implementation
integrated at first than apply other patch to remove the wrong
implementation and add the new one.

I am going to implement it on nand_spl.

> Thanks

Thank you very much,

> Guennadi
> ---
> Guennadi Liakhovetski, Ph.D.
>
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
>

Alan

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Wolfgang Denk]

Dear "Alan Carvalho de Assis",

In message <37367b3a0810230551m2aacfeb8l3b932f8f2a0b3058@mail.gmail.com> you wrote:
> This code is executed from internal 2KB NAND Flash Controller RAM buffer
> and will copy the remaining U-Boot code from NAND Flash verifying its
> bad blocks (case it exists).
> 
> Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>
> ---
>  cpu/arm1136/mx31/Makefile             |    2 +
>  cpu/arm1136/mx31/nand_copy.S          |  263 +++++++++++++++++++++++++++++++++
>  include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++
>  3 files changed, 334 insertions(+), 0 deletions(-)
>  create mode 100644 cpu/arm1136/mx31/nand_copy.S

NAK.

All this should be in nand_spl/, I think.

Scott, am I right?

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
"Language shapes the way we think, and determines what we  can  think
about."                                                 - B. L. Whorf

[U-Boot] [PATCH 2/3] iMX31: Add support to copy NAND Flash code to RAM

[Scott Wood]

Wolfgang Denk wrote:
> Dear "Alan Carvalho de Assis",
> 
> In message <37367b3a0810230551m2aacfeb8l3b932f8f2a0b3058@mail.gmail.com> you wrote:
>> This code is executed from internal 2KB NAND Flash Controller RAM buffer
>> and will copy the remaining U-Boot code from NAND Flash verifying its
>> bad blocks (case it exists).
>>
>> Signed-off-by: Alan Carvalho de Assis <alan.assis@freescale.com>
>> ---
>>  cpu/arm1136/mx31/Makefile             |    2 +
>>  cpu/arm1136/mx31/nand_copy.S          |  263 +++++++++++++++++++++++++++++++++
>>  include/asm-arm/arch-mx31/mx31-regs.h |   69 +++++++++
>>  3 files changed, 334 insertions(+), 0 deletions(-)
>>  create mode 100644 cpu/arm1136/mx31/nand_copy.S
> 
> NAK.
> 
> All this should be in nand_spl/, I think.
> 
> Scott, am I right?

Yes.

-Scott