FreeCalypso > hg > freecalypso-sw

annotate loadtools/srecreader.c @ 923:10b4bed10192

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gsm-fw/L1: fix for the DSP patch corruption bug The L1 code we got from the LoCosto fw contains a feature for DSP CPU load measurement. This feature is a LoCosto-ism, i.e., not applicable to earlier DBB chips (Calypso) with their respective earlier DSP ROMs. Most of the code dealing with that feature is conditionalized as #if (DSP >= 38), but one spot was missed, and the MCU code was writing into an API word dealing with this feature. In TCS211 this DSP API word happens to be used by the DSP code patch, hence that write was corrupting the patched DSP code.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Mon, 19 Oct 2015 17:13:56 +0000
parents fea204bc7674
children
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1 /*
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2 * This module contains the functions for reading S-record files.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdint.h>
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7 #include <stdio.h>
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8 #include <ctype.h>
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9 #include <strings.h>
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10 #include "srecreader.h"
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11
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12 open_srec_file(sr)
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13 struct srecreader *sr;
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14 {
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15 sr->openfile = fopen(sr->filename, "r");
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16 if (!sr->openfile) {
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17 perror(sr->filename);
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18 return(-1);
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19 }
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20 sr->lineno = 0;
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21 return(0);
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22 }
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23
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24 static
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25 srec2bin(sr, asciiline)
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26 struct srecreader *sr;
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27 char *asciiline;
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28 {
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29 register int i, l, b;
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30
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31 l = decode_hex_byte(asciiline + 2);
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32 if (l < 1) {
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33 fprintf(stderr, "%s line %d: S-record length octet is bad\n",
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34 sr->filename, sr->lineno);
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35 return(-1);
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36 }
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37 sr->record[0] = l;
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38 for (i = 1; i <= l; i++) {
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39 b = decode_hex_byte(asciiline + i*2 + 2);
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40 if (b < 0) {
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41 fprintf(stderr,
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42 "%s line %d: S-record hex decode error\n",
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43 sr->filename, sr->lineno);
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44 return(-1);
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45 }
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46 sr->record[i] = b;
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47 }
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48 return(0);
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49 }
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50
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51 static
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52 srec_cksum(sr)
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53 struct srecreader *sr;
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54 {
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55 u_char accum;
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56 register int i, len;
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57
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58 len = sr->record[0] + 1;
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59 accum = 0;
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60 for (i = 0; i < len; i++)
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61 accum += sr->record[i];
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62 if (accum != 0xFF) {
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63 fprintf(stderr, "%s line %d: bad S-record checksum\n",
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64 sr->filename, sr->lineno);
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65 return(-1);
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66 }
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67 return(0);
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68 }
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69
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70 read_s_record(sr)
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71 struct srecreader *sr;
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72 {
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73 char asciiline[1024];
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74
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75 if (!fgets(asciiline, sizeof asciiline, sr->openfile)) {
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76 fprintf(stderr, "%s: premature EOF after %d S-records\n",
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77 sr->filename, sr->lineno);
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78 return(-1);
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79 }
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80 sr->lineno++;
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81 if (asciiline[0] != 'S' || !isdigit(asciiline[1])) {
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82 fprintf(stderr, "%s line %d: S-record expected\n",
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83 sr->filename, sr->lineno);
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84 return(-1);
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85 }
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86 sr->record_type = asciiline[1];
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87 if (srec2bin(sr, asciiline) < 0)
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88 return(-1);
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89 return srec_cksum(sr);
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90 }
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91
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92 s3s7_get_addr_data(sr)
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93 struct srecreader *sr;
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94 {
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95 if (sr->record[0] < 5) {
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96 fprintf(stderr, "%s line %d: S%c record is too short\n",
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97 sr->filename, sr->lineno, sr->record_type);
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98 return(-1);
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99 }
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100 sr->datalen = sr->record[0] - 5;
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101 sr->addr = ((uint32_t)sr->record[1] << 24) |
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102 ((uint32_t)sr->record[2] << 16) |
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103 ((uint32_t)sr->record[3] << 8) |
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104 (uint32_t)sr->record[4];
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105 return(0);
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106 }