[U-Boot] [PATCH V2 7/7] cm-t35: add support for loading splash image from NAND

[Nikita Kiryanov <nikita@compulab.co.il>]

Following the discussion in "Create an API for safely accessing BMP 
header fields",
this patch should be reverted to V1:

http://patchwork.ozlabs.org/patch/207950/

On 01/31/2013 09:40 AM, Nikita Kiryanov wrote:
> Add support for loading splash image from NAND
>
> Cc: Anatolij Gustschin <agust@denx.de>
> Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
> Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
> Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
> ---
> Changes in V2:
> 	- Added fix to bmp_load_addr to comply with what happens in lcd.c
> 	following patch number 3.
>
>   board/cm_t35/cm_t35.c    |   65 ++++++++++++++++++++++++++++++++++++++++++++++
>   include/configs/cm_t35.h |    4 +++
>   2 files changed, 69 insertions(+)
>
> diff --git a/board/cm_t35/cm_t35.c b/board/cm_t35/cm_t35.c
> index 8f3d735..5fd71f9 100644
> --- a/board/cm_t35/cm_t35.c
> +++ b/board/cm_t35/cm_t35.c
> @@ -33,7 +33,9 @@
>   #include <net.h>
>   #include <i2c.h>
>   #include <usb.h>
> +#include <nand.h>
>   #include <twl4030.h>
> +#include <bmp_layout.h>
>   #include <linux/compiler.h>
>
>   #include <asm/io.h>
> @@ -75,6 +77,69 @@ static u32 gpmc_nand_config[GPMC_MAX_REG] = {
>   	0,
>   };
>
> +#ifdef CONFIG_LCD
> +#ifdef CONFIG_CMD_NAND
> +static int splash_load_from_nand(u32 bmp_load_addr)
> +{
> +	struct bmp_header *bmp_hdr;
> +	int res, splash_screen_nand_offset = 0x100000;
> +	size_t bmp_size, bmp_header_size = sizeof(struct bmp_header);
> +
> +	if (bmp_load_addr + bmp_header_size >= gd->start_addr_sp)
> +		goto splash_address_too_high;
> +
> +	res = nand_read_skip_bad(&nand_info[nand_curr_device],
> +			splash_screen_nand_offset, &bmp_header_size,
> +			(u_char *)bmp_load_addr);
> +	if (res < 0)
> +		return res;
> +
> +	bmp_hdr = (struct bmp_header *)bmp_load_addr;
> +	bmp_size = le32_to_cpu(bmp_hdr->file_size);
> +
> +	if (bmp_load_addr + bmp_size >= gd->start_addr_sp)
> +		goto splash_address_too_high;
> +
> +	return nand_read_skip_bad(&nand_info[nand_curr_device],
> +			splash_screen_nand_offset, &bmp_size,
> +			(u_char *)bmp_load_addr);
> +
> +splash_address_too_high:
> +	printf("Error: splashimage address too high. Data overwrites U-Boot "
> +		"and/or placed beyond DRAM boundaries.\n");
> +
> +	return -1;
> +}
> +#else
> +static inline int splash_load_from_nand(void)
> +{
> +	return -1;
> +}
> +#endif /* CONFIG_CMD_NAND */
> +
> +int board_splash_screen_prepare(void)
> +{
> +	char *env_splashimage_value;
> +	u32 bmp_load_addr;
> +
> +	env_splashimage_value = getenv("splashimage");
> +	if (env_splashimage_value == NULL)
> +		return -1;
> +
> +	bmp_load_addr = simple_strtoul(env_splashimage_value, 0, 16);
> +	if (bmp_load_addr == 0) {
> +		printf("Error: bad splashimage address specified\n");
> +		return -1;
> +	}
> +
> +	/* Fix bmp_load_addr to the alignment that lcd.c expects */
> +	if (bmp_load_addr % 4 != 2)
> +		bmp_load_addr += (bmp_load_addr % 4) ?: 2;
> +
> +	return splash_load_from_nand(bmp_load_addr);
> +}
> +#endif /* CONFIG_LCD */
> +
>   /*
>    * Routine: board_init
>    * Description: hardware init.
> diff --git a/include/configs/cm_t35.h b/include/configs/cm_t35.h
> index 46d35ba..53c4e3c 100644
> --- a/include/configs/cm_t35.h
> +++ b/include/configs/cm_t35.h
> @@ -344,5 +344,9 @@
>   #define LCD_BPP		LCD_COLOR16
>
>   #define CONFIG_LCD
> +#define CONFIG_SPLASH_SCREEN
> +#define CONFIG_CMD_BMP
> +#define CONFIG_BMP_16BPP
> +#define CONFIG_SPLASH_SCREEN_PREPARE
>
>   #endif /* __CONFIG_H */
>


-- 
Regards,
Nikita.