splash_source.c
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/*
* (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
*
* Authors: Igor Grinberg <grinberg@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <nand.h>
#include <errno.h>
#include <splash.h>
#include <spi_flash.h>
#include <spi.h>
#include <bmp_layout.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_SPI_FLASH
static struct spi_flash *sf;
static int splash_sf_read(u32 bmp_load_addr, int offset, size_t read_size)
{
if (!sf) {
sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
CONFIG_SF_DEFAULT_CS,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!sf)
return -ENODEV;
}
return spi_flash_read(sf, offset, read_size, (void *)bmp_load_addr);
}
#else
static int splash_sf_read(u32 bmp_load_addr, int offset, size_t read_size)
{
debug("%s: sf support not available\n", __func__);
return -ENOSYS;
}
#endif
#ifdef CONFIG_CMD_NAND
static int splash_nand_read(u32 bmp_load_addr, int offset, size_t read_size)
{
return nand_read_skip_bad(&nand_info[nand_curr_device], offset,
&read_size, NULL,
nand_info[nand_curr_device].size,
(u_char *)bmp_load_addr);
}
#else
static int splash_nand_read(u32 bmp_load_addr, int offset, size_t read_size)
{
debug("%s: nand support not available\n", __func__);
return -ENOSYS;
}
#endif
static int splash_storage_read(struct splash_location *location,
u32 bmp_load_addr, size_t read_size)
{
u32 offset;
if (!location)
return -EINVAL;
offset = location->offset;
switch (location->storage) {
case SPLASH_STORAGE_NAND:
return splash_nand_read(bmp_load_addr, offset, read_size);
case SPLASH_STORAGE_SF:
return splash_sf_read(bmp_load_addr, offset, read_size);
default:
printf("Unknown splash location\n");
}
return -EINVAL;
}
static int splash_load_raw(struct splash_location *location, u32 bmp_load_addr)
{
struct bmp_header *bmp_hdr;
int res;
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 = splash_storage_read(location, bmp_load_addr, bmp_header_size);
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 splash_storage_read(location, bmp_load_addr, bmp_size);
splash_address_too_high:
printf("Error: splashimage address too high. Data overwrites U-Boot and/or placed beyond DRAM boundaries.\n");
return -EFAULT;
}
/**
* select_splash_location - return the splash location based on board support
* and env variable "splashsource".
*
* @locations: An array of supported splash locations.
* @size: Size of splash_locations array.
*
* @return: If a null set of splash locations is given, or
* splashsource env variable is set to unsupported value
* return NULL.
* If splashsource env variable is not defined
* return the first entry in splash_locations as default.
* If splashsource env variable contains a supported value
* return the location selected by splashsource.
*/
static struct splash_location *select_splash_location(
struct splash_location *locations, uint size)
{
int i;
char *env_splashsource;
if (!locations || size == 0)
return NULL;
env_splashsource = getenv("splashsource");
if (env_splashsource == NULL)
return &locations[0];
for (i = 0; i < size; i++) {
if (!strcmp(locations[i].name, env_splashsource))
return &locations[i];
}
printf("splashsource env variable set to unsupported value\n");
return NULL;
}
/**
* splash_source_load - load splash image from a supported location.
*
* Select a splash image location based on the value of splashsource environment
* variable and the board supported splash source locations, and load a
* splashimage to the address pointed to by splashimage environment variable.
*
* @locations: An array of supported splash locations.
* @size: Size of splash_locations array.
*
* @return: 0 on success, negative value on failure.
*/
int splash_source_load(struct splash_location *locations, uint size)
{
struct splash_location *splash_location;
char *env_splashimage_value;
u32 bmp_load_addr;
env_splashimage_value = getenv("splashimage");
if (env_splashimage_value == NULL)
return -ENOENT;
bmp_load_addr = simple_strtoul(env_splashimage_value, 0, 16);
if (bmp_load_addr == 0) {
printf("Error: bad splashimage address specified\n");
return -EFAULT;
}
splash_location = select_splash_location(locations, size);
if (!splash_location)
return -EINVAL;
return splash_load_raw(splash_location, bmp_load_addr);
}