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 { "rk3399", "RK33", 0x20000 }, 60 }; 61 62 static unsigned char rc4_key[16] = { 63 124, 78, 3, 4, 85, 5, 9, 7, 64 45, 44, 123, 56, 23, 13, 23, 17 65 }; 66 67 static struct spl_info *rkcommon_get_spl_info(char *imagename) 68 { 69 int i; 70 71 for (i = 0; i < ARRAY_SIZE(spl_infos); i++) 72 if (!strncmp(imagename, spl_infos[i].imagename, 6)) 73 return spl_infos + i; 74 75 return NULL; 76 } 77 78 int rkcommon_check_params(struct image_tool_params *params) 79 { 80 int i; 81 82 if (rkcommon_get_spl_info(params->imagename) != NULL) 83 return 0; 84 85 fprintf(stderr, "ERROR: imagename (%s) is not supported!\n", 86 strlen(params->imagename) > 0 ? params->imagename : "NULL"); 87 88 fprintf(stderr, "Available imagename:"); 89 for (i = 0; i < ARRAY_SIZE(spl_infos); i++) 90 fprintf(stderr, "\t%s", spl_infos[i].imagename); 91 fprintf(stderr, "\n"); 92 93 return -1; 94 } 95 96 const char *rkcommon_get_spl_hdr(struct image_tool_params *params) 97 { 98 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 99 100 /* 101 * info would not be NULL, because of we checked params before. 102 */ 103 return info->spl_hdr; 104 } 105 106 int rkcommon_get_spl_size(struct image_tool_params *params) 107 { 108 struct spl_info *info = rkcommon_get_spl_info(params->imagename); 109 110 /* 111 * info would not be NULL, because of we checked params before. 112 */ 113 return info->spl_size; 114 } 115 116 int rkcommon_set_header(void *buf, uint file_size, 117 struct image_tool_params *params) 118 { 119 struct header0_info *hdr; 120 121 if (file_size > rkcommon_get_spl_size(params)) 122 return -ENOSPC; 123 124 memset(buf, '\0', RK_INIT_OFFSET * RK_BLK_SIZE); 125 hdr = (struct header0_info *)buf; 126 hdr->signature = RK_SIGNATURE; 127 hdr->disable_rc4 = 1; 128 hdr->init_offset = RK_INIT_OFFSET; 129 130 hdr->init_size = (file_size + RK_BLK_SIZE - 1) / RK_BLK_SIZE; 131 hdr->init_size = (hdr->init_size + 3) & ~3; 132 hdr->init_boot_size = hdr->init_size + RK_MAX_BOOT_SIZE / RK_BLK_SIZE; 133 134 rc4_encode(buf, RK_BLK_SIZE, rc4_key); 135 136 return 0; 137 } 138