[U-Boot] [PATCH 3/3] arm: omap3: Add SPL support to cm_t35

[Igor Grinberg]

Hi Stefan,

On 06/14/13 11:55, Stefan Roese wrote:
> Add SPL U-Boot support to replace x-loader on the Compulab cm_t35
> board. Currently only the 256MiB SDRAM board versions are supported.
> 
> Tested by booting via MMC and NAND.
> 
> Signed-off-by: Stefan Roese <sr at denx.de>
> Cc: Tom Rini <trini at ti.com>
> Cc: Igor Grinberg <grinberg at compulab.co.il>
> ---
>  board/compulab/cm_t35/cm_t35.c | 18 +++++++++++-
>  include/configs/cm_t35.h       | 64 ++++++++++++++++++++++++++++++++++++++++--
>  2 files changed, 79 insertions(+), 3 deletions(-)
> 
> diff --git a/board/compulab/cm_t35/cm_t35.c b/board/compulab/cm_t35/cm_t35.c
> index b0b80e5..cd7882e 100644
> --- a/board/compulab/cm_t35/cm_t35.c
> +++ b/board/compulab/cm_t35/cm_t35.c
> @@ -120,6 +120,22 @@ static inline int splash_load_from_nand(void)
>  }
>  #endif /* CONFIG_CMD_NAND */
>  
> +#ifdef CONFIG_SPL_BUILD
> +/*
> + * Routine: get_board_mem_timings
> + * Description: If we use SPL then there is no x-loader nor config header
> + * so we have to setup the DDR timings ourself on both banks.
> + */
> +void get_board_mem_timings(struct board_sdrc_timings *timings)
> +{
> +	timings->mr = MICRON_V_MR_165;
> +	timings->mcfg = MICRON_V_MCFG_165(256 << 20);
> +	timings->ctrla = MICRON_V_ACTIMA_165;
> +	timings->ctrlb = MICRON_V_ACTIMB_165;
> +	timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
> +}
> +#endif

I still haven't checked the timings...
Hopefully, I will sometime during this week.

> +
>  int board_splash_screen_prepare(void)
>  {
>  	char *env_splashimage_value;
> @@ -443,7 +459,7 @@ void set_muxconf_regs(void)
>  		cm_t3730_set_muxconf();
>  }
>  
> -#ifdef CONFIG_GENERIC_MMC
> +#if defined(CONFIG_GENERIC_MMC) && !defined(CONFIG_SPL_BUILD)
>  int board_mmc_getcd(struct mmc *mmc)
>  {
>  	u8 val;
> diff --git a/include/configs/cm_t35.h b/include/configs/cm_t35.h
> index c6e357a..b76810d 100644
> --- a/include/configs/cm_t35.h
> +++ b/include/configs/cm_t35.h
> @@ -40,8 +40,6 @@
>  #define CONFIG_OMAP_GPIO
>  #define CONFIG_CM_T3X	/* working with CM-T35 and CM-T3730 */
>  
> -#define CONFIG_SYS_TEXT_BASE	0x80008000
> -
>  #define CONFIG_SDRC	/* The chip has SDRC controller */
>  
>  #include <asm/arch/cpu.h>		/* get chip and board defs */
> @@ -341,4 +339,66 @@
>  #define CONFIG_BMP_16BPP
>  #define CONFIG_SPLASH_SCREEN_PREPARE
>  
> +/* Defines for SPL */
> +#define CONFIG_SPL
> +#define CONFIG_SPL_FRAMEWORK
> +#define CONFIG_SPL_NAND_SIMPLE
> +#define CONFIG_SPL_TEXT_BASE		0x40200800
> +#define CONFIG_SPL_MAX_SIZE		(54 * 1024)	/* 8 KB for stack */
> +#define CONFIG_SPL_STACK		LOW_LEVEL_SRAM_STACK
> +
> +#define CONFIG_SPL_BSS_START_ADDR	0x80000000
> +#define CONFIG_SPL_BSS_MAX_SIZE		0x80000		/* 512 KB */
> +
> +#define CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR	0x300 /* address 0x60000 */
> +#define CONFIG_SYS_U_BOOT_MAX_SIZE_SECTORS	0x200 /* 256 KB */
> +#define CONFIG_SYS_MMC_SD_FAT_BOOT_PARTITION	1
> +#define CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME	"u-boot.img"
> +
> +#define CONFIG_SPL_BOARD_INIT
> +#define CONFIG_SPL_LIBCOMMON_SUPPORT
> +#define CONFIG_SPL_LIBDISK_SUPPORT
> +#define CONFIG_SPL_I2C_SUPPORT
> +#define CONFIG_SPL_LIBGENERIC_SUPPORT
> +#define CONFIG_SPL_MMC_SUPPORT
> +#define CONFIG_SPL_FAT_SUPPORT
> +#define CONFIG_SPL_SERIAL_SUPPORT
> +#define CONFIG_SPL_NAND_SUPPORT
> +#define CONFIG_SPL_NAND_BASE
> +#define CONFIG_SPL_NAND_DRIVERS
> +#define CONFIG_SPL_NAND_ECC
> +#define CONFIG_SPL_GPIO_SUPPORT
> +#define CONFIG_SPL_POWER_SUPPORT
> +#define CONFIG_SPL_OMAP3_ID_NAND
> +#define CONFIG_SPL_LDSCRIPT		"$(CPUDIR)/omap-common/u-boot-spl.lds"
> +
> +/* NAND boot config */
> +#define CONFIG_SYS_NAND_5_ADDR_CYCLE
> +#define CONFIG_SYS_NAND_PAGE_COUNT	64
> +#define CONFIG_SYS_NAND_PAGE_SIZE	2048
> +#define CONFIG_SYS_NAND_OOBSIZE		64
> +#define CONFIG_SYS_NAND_BLOCK_SIZE	(128 * 1024)
> +#define CONFIG_SYS_NAND_BAD_BLOCK_POS	NAND_LARGE_BADBLOCK_POS
> +/*
> + * Use the ECC/OOB layout from omap_gpmc.h that matches your chip:
> + * SP vs LP, 8bit vs 16bit: GPMC_NAND_HW_ECC_LAYOUT
> + */
> +#define CONFIG_SYS_NAND_ECCPOS		{ 1, 2, 3, 4, 5, 6, 7, 8, 9, \
> +					 10, 11, 12 }
> +#define CONFIG_SYS_NAND_ECCSIZE		512
> +#define CONFIG_SYS_NAND_ECCBYTES	3
> +
> +#define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
> +#define CONFIG_SYS_NAND_U_BOOT_OFFS	0x80000
> +
> +/*
> + * 1MB into the SDRAM to allow for SPL's bss at the beginning of SDRAM
> + * 64 bytes before this address should be set aside for u-boot.img's
> + * header. That is 0x800FFFC0--0x80100000 should not be used for any
> + * other needs.
> + */
> +#define CONFIG_SYS_TEXT_BASE		0x80100000

Now this is a problem.
This breaks the backward compatibility with our X-Loader and we
cannot just switch to 80100000...

> +#define CONFIG_SYS_SPL_MALLOC_START	0x80208000
> +#define CONFIG_SYS_SPL_MALLOC_SIZE	0x100000
> +
>  #endif /* __CONFIG_H */
> 

-- 
Regards,
Igor.