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cm-t35: add support for loading splash image from NAND 

Add support for loading splash image from NAND

Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
This commit is contained in:
Nikita Kiryanov 2012-12-22 21:03:48 +00:00 committed by Tom Rini
parent 131a1e603b
commit f35034fe16
2 changed files with 65 additions and 0 deletions
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61
board/cm_t35/cm_t35.c
View File

@ -34,7 +34,9 @@
#include <i2c.h>
#include <usb.h>
#include <mmc.h>
#include <nand.h>
#include <twl4030.h>
#include <bmp_layout.h>
#include <linux/compiler.h>
#include <asm/io.h>
@ -76,6 +78,65 @@ 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;
}
return splash_load_from_nand(bmp_load_addr);
}
#endif /* CONFIG_LCD */
/*
* Routine: board_init
* Description: hardware init.

4
include/configs/cm_t35.h
View File

@ -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 */