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 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 31 */ 32 struct header0_info { 33 uint32_t signature; 34 uint8_t reserved[4]; 35 uint32_t disable_rc4; 36 uint16_t init_offset; 37 uint8_t reserved1[492]; 38 uint16_t init_size; 39 uint16_t init_boot_size; 40 uint8_t reserved2[2]; 41 }; 42 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 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 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) 117 { 118 struct header0_info *hdr; 119 120 if (file_size > rkcommon_get_spl_size(params)) 121 return -ENOSPC; 122 123 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE); 124 hdr = (struct header0_info *)buf; 125 hdr->signature = RK_SIGNATURE; 126 hdr->disable_rc4 = 1; 127 hdr->init_offset = RK_INIT_OFFSET; 128 129 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; 132 133 rc4_encode(buf, RK_BLK_SIZE, rc4_key); 134 135 return 0; 136 } 137