blob: 43896226c0d70fdb7f91d318e99fab3df0887072 [file] [log] [blame]
Simon Glassa131c1f2015-08-30 16:55:24 -06001/*
2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 *
7 * Helper functions for Rockchip images
8 */
9
10#include "imagetool.h"
11#include <image.h>
12#include <rc4.h>
13#include "mkimage.h"
14#include "rkcommon.h"
15
16enum {
17 RK_SIGNATURE = 0x0ff0aa55,
18};
19
20/**
21 * struct header0_info - header block for boot ROM
22 *
23 * This is stored at SD card block 64 (where each block is 512 bytes, or at
24 * the start of SPI flash. It is encoded with RC4.
25 *
26 * @signature: Signature (must be RKSD_SIGNATURE)
27 * @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
28 * @code1_offset: Offset in blocks of the SPL code from this header
29 * block. E.g. 4 means 2KB after the start of this header.
30 * Other fields are not used by U-Boot
31 */
32struct header0_info {
33 uint32_t signature;
34 uint8_t reserved[4];
35 uint32_t disable_rc4;
36 uint16_t code1_offset;
37 uint16_t code2_offset;
38 uint8_t reserved1[490];
39 uint16_t usflashdatasize;
40 uint16_t ucflashbootsize;
41 uint8_t reserved2[2];
42};
43
44static unsigned char rc4_key[16] = {
45 124, 78, 3, 4, 85, 5, 9, 7,
46 45, 44, 123, 56, 23, 13, 23, 17
47};
48
49int rkcommon_set_header(void *buf, uint file_size)
50{
51 struct header0_info *hdr;
52
53 if (file_size > RK_MAX_CODE1_SIZE)
54 return -ENOSPC;
55
56 memset(buf, '\0', RK_CODE1_OFFSET * RK_BLK_SIZE);
57 hdr = (struct header0_info *)buf;
58 hdr->signature = RK_SIGNATURE;
59 hdr->disable_rc4 = 1;
60 hdr->code1_offset = RK_CODE1_OFFSET;
61 hdr->code2_offset = 8;
62
63 hdr->usflashdatasize = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE;
64 hdr->usflashdatasize = (hdr->usflashdatasize + 3) & ~3;
65 hdr->ucflashbootsize = hdr->usflashdatasize;
66
67 debug("size=%x, %x\n", params->file_size, hdr->usflashdatasize);
68
69 rc4_encode(buf, RK_BLK_SIZE, rc4_key);
70
71 return 0;
72}