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// SPDX-License-Identifier: GPL-2.0+
/*
* Image manipulator for Vybrid SoCs
*
* Derived from vybridimage.c
*
* (C) Copyright 2016 DENX Software Engineering GmbH
* Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
*/
#include "imagetool.h"
#include <compiler.h>
#include <image.h>
/*
* NAND page 0 boot header
*/
struct nand_page_0_boot_header {
union {
uint32_t fcb[128];
uint8_t fcb_bytes[512];
}; /* 0x00000000 - 0x000001ff */
uint8_t sw_ecc[512]; /* 0x00000200 - 0x000003ff */
uint32_t padding[65280]; /* 0x00000400 - 0x0003ffff */
uint8_t ivt_prefix[1024]; /* 0x00040000 - 0x000403ff */
};
/* signature byte for a readable block */
static struct nand_page_0_boot_header vybridimage_header;
static int vybridimage_check_image_types(uint8_t type)
{
if (type == IH_TYPE_VYBRIDIMAGE)
return EXIT_SUCCESS;
return EXIT_FAILURE;
}
static uint8_t vybridimage_sw_ecc(uint8_t byte)
{
uint8_t bit0 = (byte & (1 << 0)) ? 1 : 0;
uint8_t bit1 = (byte & (1 << 1)) ? 1 : 0;
uint8_t bit2 = (byte & (1 << 2)) ? 1 : 0;
uint8_t bit3 = (byte & (1 << 3)) ? 1 : 0;
uint8_t bit4 = (byte & (1 << 4)) ? 1 : 0;
uint8_t bit5 = (byte & (1 << 5)) ? 1 : 0;
uint8_t bit6 = (byte & (1 << 6)) ? 1 : 0;
uint8_t bit7 = (byte & (1 << 7)) ? 1 : 0;
uint8_t res = 0;
res |= ((bit6 ^ bit5 ^ bit3 ^ bit2) << 0);
res |= ((bit7 ^ bit5 ^ bit4 ^ bit2 ^ bit1) << 1);
res |= ((bit7 ^ bit6 ^ bit5 ^ bit1 ^ bit0) << 2);
res |= ((bit7 ^ bit4 ^ bit3 ^ bit0) << 3);
res |= ((bit6 ^ bit4 ^ bit3 ^ bit2 ^ bit1 ^ bit0) << 4);
return res;
}
static int vybridimage_verify_header(unsigned char *ptr, int image_size,
struct image_tool_params *params)
{
struct nand_page_0_boot_header *hdr =
(struct nand_page_0_boot_header *)ptr;
int idx;
if (hdr->fcb[1] != 0x46434220)
return -1;
if (hdr->fcb[2] != 1)
return -1;
if (hdr->fcb[7] != 64)
return -1;
if (hdr->fcb[14] != 6)
return -1;
if (hdr->fcb[30] != 0x0001ff00)
return -1;
if (hdr->fcb[43] != 1)
return -1;
if (hdr->fcb[54] != 0)
return -1;
if (hdr->fcb[55] != 8)
return -1;
/* check software ECC */
for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++) {
uint8_t sw_ecc = vybridimage_sw_ecc(hdr->fcb_bytes[idx]);
if (sw_ecc != hdr->sw_ecc[idx])
return -1;
}
return 0;
}
static void vybridimage_set_header(void *ptr, struct stat *sbuf, int ifd,
struct image_tool_params *params)
{
struct nand_page_0_boot_header *hdr =
(struct nand_page_0_boot_header *)ptr;
int idx;
/* fill header with 0x00 for first 56 entries then 0xff */
memset(&hdr->fcb[0], 0x0, 56*sizeof(uint32_t));
memset(&hdr->fcb[56], 0xff, 72*sizeof(uint32_t));
/* fill SW ecc and padding with 0xff */
memset(&hdr->sw_ecc[0], 0xff, sizeof(hdr->sw_ecc));
memset(&hdr->padding[0], 0xff, sizeof(hdr->padding));
/* fill IVT prefix with 0x00 */
memset(&hdr->ivt_prefix[0], 0x00, sizeof(hdr->ivt_prefix));
/* populate fcb */
hdr->fcb[1] = 0x46434220; /* signature */
hdr->fcb[2] = 0x00000001; /* version */
hdr->fcb[5] = 2048; /* page size */
hdr->fcb[6] = (2048+64); /* page + OOB size */
hdr->fcb[7] = 64; /* pages per block */
hdr->fcb[14] = 6; /* ECC mode 6 */
hdr->fcb[26] = 128; /* fw address (0x40000) in 2K pages */
hdr->fcb[27] = 128; /* fw address (0x40000) in 2K pages */
hdr->fcb[30] = 0x0001ff00; /* DBBT search area start address */
hdr->fcb[33] = 2048; /* BB marker physical offset */
hdr->fcb[43] = 1; /* DISBBM */
hdr->fcb[54] = 0; /* DISBB_Search */
hdr->fcb[55] = 8; /* Bad block search limit */
/* compute software ECC */
for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++)
hdr->sw_ecc[idx] = vybridimage_sw_ecc(hdr->fcb_bytes[idx]);
}
static void vybridimage_print_hdr_field(struct nand_page_0_boot_header *hdr,
int idx)
{
printf("header.fcb[%d] = %08x\n", idx, hdr->fcb[idx]);
}
static void vybridimage_print_header(const void *ptr)
{
struct nand_page_0_boot_header *hdr =
(struct nand_page_0_boot_header *)ptr;
int idx;
for (idx = 0; idx < 56; idx++)
vybridimage_print_hdr_field(hdr, idx);
}
/*
* vybridimage parameters
*/
U_BOOT_IMAGE_TYPE(
vybridimage,
"Vybrid Boot Image",
sizeof(vybridimage_header),
(void *)&vybridimage_header,
NULL,
vybridimage_verify_header,
vybridimage_print_header,
vybridimage_set_header,
NULL,
vybridimage_check_image_types,
NULL,
NULL
);
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