Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 1 | /* |
| 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 | |
| 16 | enum { |
| 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 Chen | 0e7c90a | 2015-11-17 14:20:30 +0800 | [diff] [blame] | 28 | * @init_offset: Offset in blocks of the SPL code from this header |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 29 | * block. E.g. 4 means 2KB after the start of this header. |
| 30 | * Other fields are not used by U-Boot |
| 31 | */ |
| 32 | struct header0_info { |
| 33 | uint32_t signature; |
| 34 | uint8_t reserved[4]; |
| 35 | uint32_t disable_rc4; |
Jeffy Chen | 0e7c90a | 2015-11-17 14:20:30 +0800 | [diff] [blame] | 36 | uint16_t init_offset; |
| 37 | uint8_t reserved1[492]; |
| 38 | uint16_t init_size; |
| 39 | uint16_t init_boot_size; |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 40 | uint8_t reserved2[2]; |
| 41 | }; |
| 42 | |
Jeffy Chen | 06cdc34 | 2015-11-27 12:07:17 +0800 | [diff] [blame] | 43 | /** |
| 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 | */ |
| 50 | struct spl_info { |
| 51 | const char *imagename; |
| 52 | const char *spl_hdr; |
| 53 | const uint32_t spl_size; |
| 54 | }; |
| 55 | |
| 56 | static struct spl_info spl_infos[] = { |
| 57 | { "rk3036", "RK30", 0x1000 }, |
| 58 | { "rk3288", "RK32", 0x8000 }, |
| 59 | }; |
| 60 | |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 61 | static 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 Chen | 06cdc34 | 2015-11-27 12:07:17 +0800 | [diff] [blame] | 66 | static 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 | |
| 77 | int 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 | |
| 95 | const 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 | |
| 105 | int 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 | |
| 115 | int rkcommon_set_header(void *buf, uint file_size, |
| 116 | struct image_tool_params *params) |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 117 | { |
| 118 | struct header0_info *hdr; |
| 119 | |
Jeffy Chen | 06cdc34 | 2015-11-27 12:07:17 +0800 | [diff] [blame] | 120 | if (file_size > rkcommon_get_spl_size(params)) |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 121 | return -ENOSPC; |
| 122 | |
Jeffy Chen | 0e7c90a | 2015-11-17 14:20:30 +0800 | [diff] [blame] | 123 | memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE); |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 124 | hdr = (struct header0_info *)buf; |
| 125 | hdr->signature = RK_SIGNATURE; |
| 126 | hdr->disable_rc4 = 1; |
Jeffy Chen | 0e7c90a | 2015-11-17 14:20:30 +0800 | [diff] [blame] | 127 | hdr->init_offset = RK_INIT_OFFSET; |
Simon Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 128 | |
Jeffy Chen | 0e7c90a | 2015-11-17 14:20:30 +0800 | [diff] [blame] | 129 | 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 Glass | c9c7403 | 2015-08-30 16:55:24 -0600 | [diff] [blame] | 132 | |
| 133 | rc4_encode(buf, RK_BLK_SIZE, rc4_key); |
| 134 | |
| 135 | return 0; |
| 136 | } |