1 /* 2 * (C) Copyright 2000 3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 /*-------------------------------------------------------------------------- 9 * 10 * Motorola S-Record Format: 11 * 12 * Motorola S-Records are an industry-standard format for 13 * transmitting binary files to target systems and PROM 14 * programmers. LSI Logic have extended this standard to include 15 * an S4-record containing an address and a symbol. 16 * 17 * The extended S-record standard is as follows: 18 * 19 * S<type><length><address><data....><checksum> 20 * S4<length><address><name>,<checksum> 21 * 22 * Where: 23 * 24 * type 25 * is the record type. Where: 26 * 27 * 0 starting record (optional) 28 * 1 data record with 16-bit address 29 * 2 data record with 24-bit address 30 * 3 data record with 32-bit address 31 * 4 symbol record (LSI extension) 32 * 5 number of data records in preceding block 33 * 6 unused 34 * 7 ending record for S3 records 35 * 8 ending record for S2 records 36 * 9 ending record for S1 records 37 * 38 * length 39 * is two hex characters. This defines the length of the 40 * record in bytes (not characters). It includes the address 41 * field, the data field, and the checksum field. 42 * 43 * address 44 * is 4, 6, or 8 characters. Corresponding to a 16-, 24-, or 45 * 32-bit address. The address field for S4 records is 46 * always 32 bits. 47 * 48 * data 49 * 50 * Are the data bytes. Each pair of hex characters represent 51 * one byte in memory. 52 * 53 * name 54 * Is the symbol name. The symbol is terminated by a ','. 55 * 56 * checksum 57 * Is the one's complement of the 8-bit checksum. 58 * 59 * Example 60 * 61 * S0030000FC 62 * . 63 * . 64 * S325000004403C0880018D08DD900000000011000026000000003C0880012508DC50C50000B401 65 * S32500000460C50100B8C50200BCC50300C0C50400C4C50500C8C50600CCC50700D0C50800D4FA 66 * S32500000480C50900D8C50A00DCC50B00E0C50C00E4C50D00E8C50E00ECC50F00F0C51000F49A 67 * S325000004A0C51100F8C51200FCC5130100C5140104C5150108C516010CC5170110C518011434 68 * . 69 * . 70 * S70500000000FA 71 * 72 * The S0 record starts the file. The S3 records contain the 73 * data. The S7 record contains the entry address and terminates 74 * the download. 75 * 76 *-------------------------------------------------------------------------- 77 */ 78 79 #define SREC_START 0 /* Start Record (module name) */ 80 #define SREC_DATA2 1 /* Data Record with 2 byte address */ 81 #define SREC_DATA3 2 /* Data Record with 3 byte address */ 82 #define SREC_DATA4 3 /* Data Record with 4 byte address */ 83 #define SREC_COUNT 5 /* Count Record (previously transmitted) */ 84 #define SREC_END4 7 /* End Record with 4 byte start address */ 85 #define SREC_END3 8 /* End Record with 3 byte start address */ 86 #define SREC_END2 9 /* End Record with 2 byte start address */ 87 #define SREC_EMPTY 10 /* Empty Record without any data */ 88 89 #define SREC_REC_OK SREC_EMPTY /* last code without error condition */ 90 91 #define SREC_E_BADTYPE -1 /* no valid S-Record */ 92 #define SREC_E_NOSREC -2 /* line format differs from s-record */ 93 #define SREC_E_BADCHKS -3 /* checksum error in an s-record line */ 94 95 #define SREC_MAXRECLEN (512 + 4) /* max ASCII record length */ 96 #define SREC_MAXBINLEN 255 /* resulting binary length */ 97 98 int srec_decode (char *input, int *count, ulong *addr, char *data); 99