2 * (C) Copyright 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
5 * SPDX-License-Identifier: GPL-2.0+
7 * Helper functions for Rockchip images
10 #include "imagetool.h"
17 RK_SIGNATURE = 0x0ff0aa55,
21 * struct header0_info - header block for boot ROM
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.
26 * @signature: Signature (must be RKSD_SIGNATURE)
27 * @disable_rc4: 0 to use rc4 for boot image, 1 to use plain binary
28 * @init_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
37 uint8_t reserved1[492];
39 uint16_t init_boot_size;
44 * struct spl_info - spl info for each chip
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 * @spl_rc4: RC4 encode the SPL binary (same key as header)
52 const char *imagename;
54 const uint32_t spl_size;
58 static struct spl_info spl_infos[] = {
59 { "rk3036", "RK30", 0x1000, false },
60 { "rk3188", "RK31", 0x8000 - 0x800, true },
61 { "rk3288", "RK32", 0x8000, false },
62 { "rk3399", "RK33", 0x20000, false },
65 static unsigned char rc4_key[16] = {
66 124, 78, 3, 4, 85, 5, 9, 7,
67 45, 44, 123, 56, 23, 13, 23, 17
70 static struct spl_info *rkcommon_get_spl_info(char *imagename)
74 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
75 if (!strncmp(imagename, spl_infos[i].imagename, 6))
81 int rkcommon_check_params(struct image_tool_params *params)
85 if (rkcommon_get_spl_info(params->imagename) != NULL)
88 fprintf(stderr, "ERROR: imagename (%s) is not supported!\n",
89 strlen(params->imagename) > 0 ? params->imagename : "NULL");
91 fprintf(stderr, "Available imagename:");
92 for (i = 0; i < ARRAY_SIZE(spl_infos); i++)
93 fprintf(stderr, "\t%s", spl_infos[i].imagename);
94 fprintf(stderr, "\n");
99 const char *rkcommon_get_spl_hdr(struct image_tool_params *params)
101 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
104 * info would not be NULL, because of we checked params before.
106 return info->spl_hdr;
109 int rkcommon_get_spl_size(struct image_tool_params *params)
111 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
114 * info would not be NULL, because of we checked params before.
116 return info->spl_size;
119 bool rkcommon_need_rc4_spl(struct image_tool_params *params)
121 struct spl_info *info = rkcommon_get_spl_info(params->imagename);
124 * info would not be NULL, because of we checked params before.
126 return info->spl_rc4;
129 int rkcommon_set_header(void *buf, uint file_size,
130 struct image_tool_params *params)
132 struct header0_info *hdr;
134 if (file_size > rkcommon_get_spl_size(params))
137 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE);
138 hdr = (struct header0_info *)buf;
139 hdr->signature = RK_SIGNATURE;
140 hdr->disable_rc4 = !rkcommon_need_rc4_spl(params);
141 hdr->init_offset = RK_INIT_OFFSET;
143 hdr->init_size = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE;
144 hdr->init_size = (hdr->init_size + 3) & ~3;
145 hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE;
147 rc4_encode(buf, RK_BLK_SIZE, rc4_key);
152 void rkcommon_rc4_encode_spl(void *buf, unsigned int offset, unsigned int size)
154 unsigned int remaining = size;
156 while (remaining > 0) {
157 int step = (remaining > RK_BLK_SIZE) ? RK_BLK_SIZE : remaining;
159 rc4_encode(buf + offset, step, rc4_key);
160 offset += RK_BLK_SIZE;