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annotate loadtools/compalload.c @ 919:1dbc0f0851b3

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.hgignore: fc-pirhackinit added
author Space Falcon <falcon@ivan.Harhan.ORG>
date Tue, 08 Sep 2015 19:50:23 +0000
parents 7b3fd0e2a352
children
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379
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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1 /*
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2 * This module implements Compal's serial code loading protocol to load
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3 * what we call compalstage, a piece of code that re-enables the Calypso
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4 * boot ROM and allows us to use the same loadagent which we use on
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5 * freedom-enabled target devices.
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6 */
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7
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8 #include <sys/param.h>
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9 #include <sys/file.h>
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10 #include <sys/stat.h>
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11 #include <sys/ioctl.h>
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12 #include <stdio.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16 #include <termios.h>
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17 #include <unistd.h>
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18
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19 extern char default_helpers_dir[];
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20 extern char *target_ttydev;
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21 extern int target_fd;
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22 extern struct termios target_termios;
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23
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24 static char compalstage_pathname[MAXPATHLEN];
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25 static u_char *compalstage_imgbuf;
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26 static size_t compalstage_len, compalstage_totlen;
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27 static int rx_state;
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28 static u_char rx_msg[3];
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29
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30 void
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31 set_compalstage_short(arg)
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32 char *arg;
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33 {
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34 if (strcmp(arg, "none"))
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35 sprintf(compalstage_pathname, "%s/compalstage-%s.bin",
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36 default_helpers_dir, arg);
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37 else
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38 compalstage_pathname[0] = 0;
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39 }
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40
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41 void
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42 set_compalstage_fullpath(arg)
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43 char *arg;
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44 {
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45 strcpy(compalstage_pathname, arg);
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46 }
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47
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48 static void
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49 compute_checksum()
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50 {
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51 size_t i, l;
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52 u_char ck;
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53
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54 ck = 0x02;
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55 l = compalstage_len + 3;
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56 for (i = 1; i < l; i++)
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57 ck ^= compalstage_imgbuf[i];
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58 compalstage_imgbuf[l] = ck;
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59 }
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60
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61 static
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62 handle_rx_msg()
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63 {
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64 static u_char download_cmd[7] = {0x1B, 0xF6, 0x02, 0x00,
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65 0x52, 0x01, 0x53};
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66
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67 if (rx_msg[0] == 0x41 && rx_msg[1] == 0x01 && rx_msg[2] == 0x40) {
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68 printf("Received PROMPT1, sending download command\n");
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69 write(target_fd, download_cmd, 7);
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70 return(0);
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71 } else if (rx_msg[0] == 0x41 && rx_msg[1] == 0x02 && rx_msg[2] == 0x43){
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72 printf("Received PROMPT2, sending download image\n");
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73 write(target_fd, compalstage_imgbuf, compalstage_totlen);
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74 return(0);
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75 } else if (rx_msg[0] == 0x41 && rx_msg[1] == 0x03 && rx_msg[2] == 0x42){
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76 printf("Received ACK; downloaded image should now be running!\n");
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77 return(1);
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78 } else if (rx_msg[0] == 0x45 && rx_msg[1] == 0x53 && rx_msg[2] == 0x16){
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79 printf("Bootloader indicates bad checksum :-(\n");
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80 return(0);
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81 } else if (rx_msg[0] == 0x41 && rx_msg[1] == 0x03 && rx_msg[2] == 0x57){
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82 printf("Bootloader indicates bad magic :-(\n");
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83 return(0);
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84 } else {
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85 printf("Unknown msg from bootloader: 1B F6 02 00 %02X %02X %02X\n",
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86 rx_msg[0], rx_msg[1], rx_msg[2]);
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87 return(0);
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88 }
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89 }
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90
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91 static
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92 handle_rx_byte(rxb)
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93 {
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94 switch (rx_state) {
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95 case 0:
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96 if (rxb == 0x1B)
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97 rx_state = 1;
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98 return(0);
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99 case 1:
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100 if (rxb == 0xF6)
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101 rx_state = 2;
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102 else if (rxb == 0x1B)
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103 rx_state = 1;
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104 else
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105 rx_state = 0;
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106 return(0);
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107 case 2:
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108 if (rxb == 0x02)
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109 rx_state = 3;
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110 else if (rxb == 0x1B)
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111 rx_state = 1;
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112 else
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113 rx_state = 0;
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114 return(0);
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115 case 3:
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116 if (rxb == 0x00)
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117 rx_state = 4;
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118 else if (rxb == 0x1B)
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119 rx_state = 1;
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120 else
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121 rx_state = 0;
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122 return(0);
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123 case 4:
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
124 rx_msg[0] = rxb;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
125 rx_state = 5;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
126 return(0);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
127 case 5:
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
128 rx_msg[1] = rxb;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
129 rx_state = 6;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
130 return(0);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
131 case 6:
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
132 rx_msg[2] = rxb;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
133 rx_state = 0;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
134 return handle_rx_msg();
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
135 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
136 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
137
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
138 static void
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
139 read_loop()
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
140 {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
141 u_char rdbuf[16];
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
142 int cc, i;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 for (;;) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
145 cc = read(target_fd, rdbuf, sizeof rdbuf);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
146 if (cc <= 0) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 fprintf(stderr, "EOF/error on target tty\n");
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
149 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
150 for (i = 0; i < cc; i++)
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 if (handle_rx_byte(rdbuf[i]))
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 return;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
154 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
155
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
156 perform_compal_stage(for_boot_rom)
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
157 {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
158 int fd;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
159 struct stat st;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 static int zero = 0;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
161
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
162 if (!compalstage_pathname[0])
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
163 return(0);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
164 fd = open(compalstage_pathname, O_RDONLY);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
165 if (fd < 0) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
166 perror(compalstage_pathname);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
167 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
168 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
169 fstat(fd, &st);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
170 if (!S_ISREG(st.st_mode)) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
171 fprintf(stderr, "error: %s is not a regular file\n",
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
172 compalstage_pathname);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
173 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
174 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175 if (st.st_size > 65535) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
176 fprintf(stderr,
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
177 "error: %s exceed Compal download limit of 65535 bytes\n",
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
178 compalstage_pathname);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
179 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
180 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
181 compalstage_len = st.st_size;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
182 compalstage_totlen = compalstage_len + 4;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
183 compalstage_imgbuf = malloc(compalstage_totlen);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
184 if (!compalstage_imgbuf) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
185 perror("malloc");
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
186 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
187 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
188 compalstage_imgbuf[0] = 0x02;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
189 compalstage_imgbuf[1] = compalstage_len >> 8;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190 compalstage_imgbuf[2] = compalstage_len;
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191 if (read(fd, compalstage_imgbuf+3, compalstage_len) != compalstage_len){
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 fprintf(stderr, "%s: read error or short read\n",
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193 compalstage_pathname);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
194 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
195 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
196 close(fd);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
197 compute_checksum();
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
198
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
199 printf("Using Compal stage image %s\n", compalstage_pathname);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
200 cfsetispeed(&target_termios, B115200);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
201 cfsetospeed(&target_termios, B115200);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
202 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
203 perror("tcsetattr to switch baud rate");
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
204 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
205 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
206 ioctl(target_fd, FIONBIO, &zero);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
207 printf("Waiting for PROMPT1 from target (%s) at 115200 baud\n",
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
208 target_ttydev);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
209 read_loop();
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
210 free(compalstage_imgbuf);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
211
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
212 if (for_boot_rom) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
213 cfsetispeed(&target_termios, B19200);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
214 cfsetospeed(&target_termios, B19200);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
215 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
216 perror("tcsetattr to switch baud rate");
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
217 exit(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
218 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219 }
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
220
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
221 return(1);
7b3fd0e2a352 loadtools: compalstage support implemented in fc-iram
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
222 }