Commit 5132106a authored by Stefan Roese's avatar Stefan Roese
Browse files

ppc4xx: Fixup chip-selects in dtb for NAND-booting Sequoia



Currently the NOR & NAND support in Linux only works for the "standard"
Sequoia, the version booting for NOR flash. The NAND-booting version
has the chip-selects swapped. Here the chip-select mappings:

"Standard" NOR-booting version:
CS0	NOR
CS3	NAND

NAND-booting version:
CS0	NAND
CS3	NOR

With this path the dtb gets fixed-up, so that the correct chip-select
numbers are patched in the dtb enabling correct NOR & NAND support
in Linux on the NAND-booting Sequoia version.
Signed-off-by: Stefan Roese's avatarStefan Roese <sr@denx.de>
parent f75a729b
/*
* (C) Copyright 2006-2007
* (C) Copyright 2006-2009
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* (C) Copyright 2006
......@@ -35,7 +35,8 @@ DECLARE_GLOBAL_DATA_PTR;
extern flash_info_t flash_info[CONFIG_SYS_MAX_FLASH_BANKS]; /* info for FLASH chips */
ulong flash_get_size (ulong base, int banknum);
extern void __ft_board_setup(void *blob, bd_t *bd);
ulong flash_get_size(ulong base, int banknum);
int board_early_init_f(void)
{
......@@ -513,3 +514,56 @@ int post_hotkeys_pressed(void)
return 0; /* No hotkeys supported */
}
#endif /* CONFIG_POST */
#if defined(CONFIG_NAND_U_BOOT)
/*
* On NAND-booting sequoia, we need to patch the chips select numbers
* in the dtb (CS0 - NAND, CS3 - NOR)
*/
void ft_board_setup(void *blob, bd_t *bd)
{
int rc;
int len;
int nodeoffset;
struct fdt_property *prop;
u32 *reg;
char path[32];
/* First do common fdt setup */
__ft_board_setup(blob, bd);
/* And now configure NOR chip select to 3 instead of 0 */
strcpy(path, "/plb/opb/ebc/nor_flash@0,0");
nodeoffset = fdt_path_offset(blob, path);
prop = fdt_get_property_w(blob, nodeoffset, "reg", &len);
if (prop == NULL) {
printf("Unable to update NOR chip select for NAND booting\n");
return;
}
reg = (u32 *)&prop->data[0];
reg[0] = 3;
rc = fdt_find_and_setprop(blob, path, "reg", reg, 3 * sizeof(u32), 1);
if (rc) {
printf("Unable to update property NOR mappings, err=%s\n",
fdt_strerror(rc));
return;
}
/* And now configure NAND chip select to 0 instead of 3 */
strcpy(path, "/plb/opb/ebc/ndfc@3,0");
nodeoffset = fdt_path_offset(blob, path);
prop = fdt_get_property_w(blob, nodeoffset, "reg", &len);
if (prop == NULL) {
printf("Unable to update NDFC chip select for NAND booting\n");
return;
}
reg = (u32 *)&prop->data[0];
reg[0] = 0;
rc = fdt_find_and_setprop(blob, path, "reg", reg, 3 * sizeof(u32), 1);
if (rc) {
printf("Unable to update property NDFC mappings, err=%s\n",
fdt_strerror(rc));
return;
}
}
#endif /* CONFIG_NAND_U_BOOT */
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