1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Image manipulator for Vybrid SoCs 4 * 5 * Derived from vybridimage.c 6 * 7 * (C) Copyright 2016 DENX Software Engineering GmbH 8 * Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr> 9 */ 10 11 #include "imagetool.h" 12 #include <compiler.h> 13 #include <image.h> 14 15 /* 16 * NAND page 0 boot header 17 */ 18 19 struct nand_page_0_boot_header { 20 union { 21 uint32_t fcb[128]; 22 uint8_t fcb_bytes[512]; 23 }; /* 0x00000000 - 0x000001ff */ 24 uint8_t sw_ecc[512]; /* 0x00000200 - 0x000003ff */ 25 uint32_t padding[65280]; /* 0x00000400 - 0x0003ffff */ 26 uint8_t ivt_prefix[1024]; /* 0x00040000 - 0x000403ff */ 27 }; 28 29 /* signature byte for a readable block */ 30 31 static struct nand_page_0_boot_header vybridimage_header; 32 33 static int vybridimage_check_image_types(uint8_t type) 34 { 35 if (type == IH_TYPE_VYBRIDIMAGE) 36 return EXIT_SUCCESS; 37 return EXIT_FAILURE; 38 } 39 40 static uint8_t vybridimage_sw_ecc(uint8_t byte) 41 { 42 uint8_t bit0 = (byte & (1 << 0)) ? 1 : 0; 43 uint8_t bit1 = (byte & (1 << 1)) ? 1 : 0; 44 uint8_t bit2 = (byte & (1 << 2)) ? 1 : 0; 45 uint8_t bit3 = (byte & (1 << 3)) ? 1 : 0; 46 uint8_t bit4 = (byte & (1 << 4)) ? 1 : 0; 47 uint8_t bit5 = (byte & (1 << 5)) ? 1 : 0; 48 uint8_t bit6 = (byte & (1 << 6)) ? 1 : 0; 49 uint8_t bit7 = (byte & (1 << 7)) ? 1 : 0; 50 uint8_t res = 0; 51 52 res |= ((bit6 ^ bit5 ^ bit3 ^ bit2) << 0); 53 res |= ((bit7 ^ bit5 ^ bit4 ^ bit2 ^ bit1) << 1); 54 res |= ((bit7 ^ bit6 ^ bit5 ^ bit1 ^ bit0) << 2); 55 res |= ((bit7 ^ bit4 ^ bit3 ^ bit0) << 3); 56 res |= ((bit6 ^ bit4 ^ bit3 ^ bit2 ^ bit1 ^ bit0) << 4); 57 58 return res; 59 } 60 61 static int vybridimage_verify_header(unsigned char *ptr, int image_size, 62 struct image_tool_params *params) 63 { 64 struct nand_page_0_boot_header *hdr = 65 (struct nand_page_0_boot_header *)ptr; 66 int idx; 67 68 if (hdr->fcb[1] != 0x46434220) 69 return -1; 70 if (hdr->fcb[2] != 1) 71 return -1; 72 if (hdr->fcb[7] != 64) 73 return -1; 74 if (hdr->fcb[14] != 6) 75 return -1; 76 if (hdr->fcb[30] != 0x0001ff00) 77 return -1; 78 if (hdr->fcb[43] != 1) 79 return -1; 80 if (hdr->fcb[54] != 0) 81 return -1; 82 if (hdr->fcb[55] != 8) 83 return -1; 84 85 /* check software ECC */ 86 for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++) { 87 uint8_t sw_ecc = vybridimage_sw_ecc(hdr->fcb_bytes[idx]); 88 if (sw_ecc != hdr->sw_ecc[idx]) 89 return -1; 90 } 91 92 return 0; 93 } 94 95 static void vybridimage_set_header(void *ptr, struct stat *sbuf, int ifd, 96 struct image_tool_params *params) 97 { 98 struct nand_page_0_boot_header *hdr = 99 (struct nand_page_0_boot_header *)ptr; 100 int idx; 101 102 /* fill header with 0x00 for first 56 entries then 0xff */ 103 memset(&hdr->fcb[0], 0x0, 56*sizeof(uint32_t)); 104 memset(&hdr->fcb[56], 0xff, 72*sizeof(uint32_t)); 105 /* fill SW ecc and padding with 0xff */ 106 memset(&hdr->sw_ecc[0], 0xff, sizeof(hdr->sw_ecc)); 107 memset(&hdr->padding[0], 0xff, sizeof(hdr->padding)); 108 /* fill IVT prefix with 0x00 */ 109 memset(&hdr->ivt_prefix[0], 0x00, sizeof(hdr->ivt_prefix)); 110 111 /* populate fcb */ 112 hdr->fcb[1] = 0x46434220; /* signature */ 113 hdr->fcb[2] = 0x00000001; /* version */ 114 hdr->fcb[5] = 2048; /* page size */ 115 hdr->fcb[6] = (2048+64); /* page + OOB size */ 116 hdr->fcb[7] = 64; /* pages per block */ 117 hdr->fcb[14] = 6; /* ECC mode 6 */ 118 hdr->fcb[26] = 128; /* fw address (0x40000) in 2K pages */ 119 hdr->fcb[27] = 128; /* fw address (0x40000) in 2K pages */ 120 hdr->fcb[30] = 0x0001ff00; /* DBBT search area start address */ 121 hdr->fcb[33] = 2048; /* BB marker physical offset */ 122 hdr->fcb[43] = 1; /* DISBBM */ 123 hdr->fcb[54] = 0; /* DISBB_Search */ 124 hdr->fcb[55] = 8; /* Bad block search limit */ 125 126 /* compute software ECC */ 127 for (idx = 0; idx < sizeof(hdr->fcb_bytes); idx++) 128 hdr->sw_ecc[idx] = vybridimage_sw_ecc(hdr->fcb_bytes[idx]); 129 } 130 131 static void vybridimage_print_hdr_field(struct nand_page_0_boot_header *hdr, 132 int idx) 133 { 134 printf("header.fcb[%d] = %08x\n", idx, hdr->fcb[idx]); 135 } 136 137 static void vybridimage_print_header(const void *ptr) 138 { 139 struct nand_page_0_boot_header *hdr = 140 (struct nand_page_0_boot_header *)ptr; 141 int idx; 142 143 for (idx = 0; idx < 56; idx++) 144 vybridimage_print_hdr_field(hdr, idx); 145 } 146 147 /* 148 * vybridimage parameters 149 */ 150 U_BOOT_IMAGE_TYPE( 151 vybridimage, 152 "Vybrid Boot Image", 153 sizeof(vybridimage_header), 154 (void *)&vybridimage_header, 155 NULL, 156 vybridimage_verify_header, 157 vybridimage_print_header, 158 vybridimage_set_header, 159 NULL, 160 vybridimage_check_image_types, 161 NULL, 162 NULL 163 ); 164