blob: 72621fd095c69b69e7db9878b17b5bac30e8636b [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
Jeffy Chen36413392015-11-17 14:20:30 +080028 * @init_offset: Offset in blocks of the SPL code from this header
Simon Glassa131c1f2015-08-30 16:55:24 -060029 * 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;
Jeffy Chen36413392015-11-17 14:20:30 +080036 uint16_t init_offset;
37 uint8_t reserved1[492];
38 uint16_t init_size;
39 uint16_t init_boot_size;
Simon Glassa131c1f2015-08-30 16:55:24 -060040 uint8_t reserved2[2];
41};
42
Jeffy Chen7bf274b2015-11-27 12:07:17 +080043/**
44 * struct spl_info - spl info for each chip
45 *
46 * @imagename: Image name(passed by "mkimage -n")
47 * @spl_hdr: Boot ROM requires a 4-bytes spl header
48 * @spl_size: Spl size(include extra 4-bytes spl header)
49 */
50struct spl_info {
51 const char *imagename;
52 const char *spl_hdr;
53 const uint32_t spl_size;
54};
55
56static struct spl_info spl_infos[] = {
57 { "rk3036", "RK30", 0x1000 },
58 { "rk3288", "RK32", 0x8000 },
59};
60
Simon Glassa131c1f2015-08-30 16:55:24 -060061static unsigned char rc4_key[16] = {
62 124, 78, 3, 4, 85, 5, 9, 7,
63 45, 44, 123, 56, 23, 13, 23, 17
64};
65
Jeffy Chen7bf274b2015-11-27 12:07:17 +080066static struct spl_info *rkcommon_get_spl_info(char *imagename)
67{
68 int i;
69
70 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
71 if (!strncmp(imagename, spl_infos[i].imagename, 6))
72 return spl_infos + i;
73
74 return NULL;
75}
76
77int rkcommon_check_params(struct image_tool_params *params)
78{
79 int i;
80
81 if (rkcommon_get_spl_info(params->imagename) != NULL)
82 return 0;
83
84 fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
85 strlen(params->imagename) > 0 ? params->imagename : "NULL");
86
87 fprintf(stderr, "Available imagename:");
88 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
89 fprintf(stderr, "\t%s", spl_infos[i].imagename);
90 fprintf(stderr, "\n");
91
92 return -1;
93}
94
95const char *rkcommon_get_spl_hdr(struct image_tool_params *params)
96{
97 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
98
99 /*
100 * info would not be NULL, because of we checked params before.
101 */
102 return info->spl_hdr;
103}
104
105int rkcommon_get_spl_size(struct image_tool_params *params)
106{
107 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
108
109 /*
110 * info would not be NULL, because of we checked params before.
111 */
112 return info->spl_size;
113}
114
115int rkcommon_set_header(void *buf, uint file_size,
116 struct image_tool_params *params)
Simon Glassa131c1f2015-08-30 16:55:24 -0600117{
118 struct header0_info *hdr;
119
Jeffy Chen7bf274b2015-11-27 12:07:17 +0800120 if (file_size > rkcommon_get_spl_size(params))
Simon Glassa131c1f2015-08-30 16:55:24 -0600121 return -ENOSPC;
122
Jeffy Chen36413392015-11-17 14:20:30 +0800123 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
Simon Glassa131c1f2015-08-30 16:55:24 -0600124 hdr = (struct header0_info *)buf;
125 hdr->signature = RK_SIGNATURE;
126 hdr->disable_rc4 = 1;
Jeffy Chen36413392015-11-17 14:20:30 +0800127 hdr->init_offset = RK_INIT_OFFSET;
Simon Glassa131c1f2015-08-30 16:55:24 -0600128
Jeffy Chen36413392015-11-17 14:20:30 +0800129 hdr->init_size = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE;
130 hdr->init_size = (hdr->init_size + 3) & ~3;
131 hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
Simon Glassa131c1f2015-08-30 16:55:24 -0600132
133 rc4_encode(buf, RK_BLK_SIZE, rc4_key);
134
135 return 0;
136}