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arm:at91: enable ROM loadable atmel image 

For sama5d3xek we need to modify the SPL image for correct detection by ROM
code.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Tested-by: Bo Shen <voice.shen@atmel.com>
utp
Andreas Bießmann 2014-05-19 14:23:40 +02:00
parent 7b1a411743
commit 5c390a5b26
5 changed files with 95 additions and 0 deletions
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10
arch/arm/cpu/armv7/at91/config.mk 100644
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@ -0,0 +1,10 @@
#
# Copyright (C) 2014, Andreas Bießmann <andreas.devel@googlemail.com>
#
# SPDX-License-Identifier: GPL-2.0+
#
ifdef CONFIG_SPL_BUILD
ALL-y += boot.bin
else
ALL-y += u-boot.img
endif

21
doc/README.atmel_pmecc
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@ -27,3 +27,24 @@ Take AT91SAM9X5EK as an example, the board definition file likes:
#define CONFIG_ATMEL_NAND_HW_PMECC 1
#define CONFIG_PMECC_CAP 2
#define CONFIG_PMECC_SECTOR_SIZE 512
How to enable PMECC header for direct programmable boot.bin
-----------------------------------------------------------
2014-05-19 Andreas Bießmann <andreas.devel@googlemail.com>
The usual way to program SPL into NAND flash is to use the SAM-BA Atmel tool.
This however is often not usable when doing field updates. To be able to
program a SPL binary into NAND flash we need to add the PMECC header to the
binary before. Chapter '12.4.4.1 NAND Flash Boot: NAND Flash Detection' in
sama5d3 SoC spec (as of 03. April 2014) defines how this PMECC header has to
look like. In order to do so we have a new image type added to mkimage to
generate this PMECC header and integrated this into the build process of SPL.
To enable the generation of atmel PMECC header for SPL one need to define
CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER. The required parameters are taken from
board configuration and compiled into the host tools atmel_pmecc_params. This
tool will be called in build process to parametrize mkimage for atmelimage
type. The mkimage tool has intentionally _not_ compiled in those parameters.
The mkimage image type atmelimage also set the 6'th interrupt vector to the
correct value. This feature can also be used to setup a boot.bin for MMC boot.

11
spl/Makefile
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@ -183,6 +183,17 @@ MKIMAGEFLAGS_MLO.byteswap = -T omapimage -n byteswap -a $(CONFIG_SPL_TEXT_BASE)
MLO MLO.byteswap: $(obj)/u-boot-spl.bin
$(call if_changed,mkimage)
MKIMAGEFLAGS_boot.bin = -T atmelimage
ifeq ($(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER),y)
MKIMAGEFLAGS_boot.bin += -n $(shell $(obj)/../tools/atmel_pmecc_params)
boot.bin: $(obj)/../tools/atmel_pmecc_params
endif
boot.bin: $(obj)/u-boot-spl.bin
$(call if_changed,mkimage)
ALL-y += $(obj)/$(SPL_BIN).bin
ifdef CONFIG_SAMSUNG

2
tools/Makefile
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@ -38,6 +38,8 @@ ENVCRC-$(CONFIG_ENV_IS_IN_NVRAM) = y
ENVCRC-$(CONFIG_ENV_IS_IN_SPI_FLASH) = y
CONFIG_BUILD_ENVCRC ?= $(ENVCRC-y)
hostprogs-$(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER) += atmel_pmecc_params$(SFX)
# TODO: CONFIG_CMD_LICENSE does not work
hostprogs-$(CONFIG_CMD_LICENSE) += bin2header$(SFX)
hostprogs-$(CONFIG_LCD_LOGO) += bmp_logo$(SFX)

51
tools/atmel_pmecc_params.c 100644
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@ -0,0 +1,51 @@
/*
* (C) Copyright 2014 Andreas Bießmann <andreas.devel@googlemail.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* This is a host tool for generating an appropriate string out of board
* configuration. The string is required for correct generation of PMECC
* header which in turn is required for NAND flash booting of Atmel AT91 style
* hardware.
*
* See doc/README.atmel_pmecc for more information.
*/
#include <config.h>
#include <stdlib.h>
static int pmecc_get_ecc_bytes(int cap, int sector_size)
{
int m = 12 + sector_size / 512;
return (m * cap + 7) / 8;
}
int main(int argc, char *argv[])
{
unsigned int use_pmecc = 0;
unsigned int sector_per_page;
unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
unsigned int ecc_bits = CONFIG_PMECC_CAP;
unsigned int ecc_offset;
#ifdef CONFIG_ATMEL_NAND_HW_PMECC
use_pmecc = 1;
#endif
sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
ecc_offset = oob_size -
pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
printf("usePmecc=%d,", use_pmecc);
printf("sectorPerPage=%d,", sector_per_page);
printf("sectorSize=%d,", sector_size);
printf("spareSize=%d,", oob_size);
printf("eccBits=%d,", ecc_bits);
printf("eccOffset=%d", ecc_offset);
printf("\n");
exit(EXIT_SUCCESS);
}