FreeCalypso > hg > fc-usbser-tools

annotate cp2102/decode_usb_desc.c @ 100:29bff463402e

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doc/CP2102-EEPROM-format: part number byte confirmed
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 28 Sep 2023 05:39:44 +0000
parents f4a7ac90cf39
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
85
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1 /*
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2 * This program reads a CP2102 EEPROM image from an Intel HEX file
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3 * and decodes the USB descriptors portion thereof.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include "cp210x_defs.h"
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10
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11 u_char eeprom[SIZE_EEPROM];
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12
87
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13 static void
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14 print_device_desc(desc)
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15 u_char *desc;
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16 {
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17 printf(" bLength: %u", desc[0]);
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18 if (desc[0] != 18)
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19 fputs(" (WRONG!)", stdout);
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20 putchar('\n');
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21 printf(" bDescriptorType: 0x%02X", desc[1]);
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22 if (desc[1] != 0x01)
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23 fputs(" (WRONG!)", stdout);
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24 putchar('\n');
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25 printf(" bcdUSB: 0x%02X%02X\n", desc[3], desc[2]);
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26 printf(" bDeviceClass: 0x%02X\n", desc[4]);
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27 printf(" bDeviceSubClass: 0x%02X\n", desc[5]);
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28 printf(" bDeviceProtocol: 0x%02X\n", desc[6]);
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29 printf(" bMaxPacketSize0: %u\n", desc[7]);
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30 printf(" idVendor: 0x%02X%02X\n", desc[9], desc[8]);
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31 printf(" idProduct: 0x%02X%02X\n", desc[11], desc[10]);
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32 printf(" bcdDevice: 0x%02X%02X\n", desc[13], desc[12]);
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33 printf(" iManufacturer: %u\n", desc[14]);
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34 printf(" iProduct: %u\n", desc[15]);
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35 printf(" iSerialNumber: %u\n", desc[16]);
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36 printf(" bNumConfigurations: %u\n", desc[17]);
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37 }
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38
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39 static void
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40 print_config_desc(desc)
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41 u_char *desc;
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42 {
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43 printf(" bLength: %u", desc[0]);
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44 if (desc[0] != 9)
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45 fputs(" (WRONG!)", stdout);
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46 putchar('\n');
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47 printf(" bDescriptorType: 0x%02X", desc[1]);
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48 if (desc[1] != 0x02)
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49 fputs(" (WRONG!)", stdout);
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50 putchar('\n');
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51 printf(" wTotalLength: %u\n", desc[2] | (desc[3] << 8));
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52 printf(" bNumInterfaces: %u\n", desc[4]);
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53 printf(" bConfigurationValue: 0x%02X\n", desc[5]);
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54 printf(" iConfiguration: %u\n", desc[6]);
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55 printf(" bmAttributes: 0x%02X\n", desc[7]);
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56 printf(" bMaxPower: 0x%02X (%u mA)\n", desc[8], desc[8] * 2);
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57 }
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58
88
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59 static void
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60 print_interf_desc(desc)
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61 u_char *desc;
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62 {
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63 printf(" bLength: %u", desc[0]);
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64 if (desc[0] != 9)
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65 fputs(" (WRONG!)", stdout);
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66 putchar('\n');
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67 printf(" bDescriptorType: 0x%02X", desc[1]);
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68 if (desc[1] != 0x04)
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69 fputs(" (WRONG!)", stdout);
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70 putchar('\n');
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71 printf(" bInterfaceNumber: %u\n", desc[2]);
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72 printf(" bAlternateSetting: 0x%02X\n", desc[3]);
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73 printf(" bNumEndpoints: %u\n", desc[4]);
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74 printf(" bInterfaceClass: 0x%02X\n", desc[5]);
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75 printf(" bInterfaceSubClass: 0x%02X\n", desc[6]);
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76 printf(" bInterfaceProtocol: 0x%02X\n", desc[7]);
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77 printf(" iInterface: %u\n", desc[8]);
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78 }
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79
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80 static void
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81 print_endpoint_desc(desc)
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82 u_char *desc;
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83 {
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84 printf(" bLength: %u", desc[0]);
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85 if (desc[0] != 7)
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86 fputs(" (WRONG!)", stdout);
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87 putchar('\n');
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88 printf(" bDescriptorType: 0x%02X", desc[1]);
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89 if (desc[1] != 0x05)
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90 fputs(" (WRONG!)", stdout);
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91 putchar('\n');
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92 printf(" bEndpointAddress: 0x%02X\n", desc[2]);
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93 printf(" bmAttributes: 0x%02X\n", desc[3]);
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94 printf(" wMaxPacketSize: %u\n", desc[4] | (desc[5] << 8));
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95 printf(" bInterval: %u\n", desc[6]);
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96 }
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97
90
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98 static void
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99 print_string_desc_0(desc)
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100 u_char *desc;
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101 {
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102 printf(" bLength: %u", desc[0]);
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103 if (desc[0] > 8)
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104 fputs(" (too long!)", stdout);
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105 else if (desc[0] < 2)
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106 fputs(" (too short!)", stdout);
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107 else if (desc[0] & 1)
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108 fputs(" (odd bogon!)", stdout);
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109 putchar('\n');
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110 printf(" bDescriptorType: 0x%02X", desc[1]);
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111 if (desc[1] != 0x03)
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112 fputs(" (WRONG!)", stdout);
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113 putchar('\n');
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114 if (desc[0] < 4)
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115 return;
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116 printf(" wLANGID[0]: 0x%04X\n", desc[2] | (desc[3] << 8));
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117 if (desc[0] < 6)
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118 return;
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119 printf(" wLANGID[1]: 0x%04X\n", desc[4] | (desc[5] << 8));
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120 if (desc[0] < 8)
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121 return;
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122 printf(" wLANGID[2]: 0x%04X\n", desc[6] | (desc[7] << 8));
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123 }
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diff changeset
124
91
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
125 static void
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
126 print_string_desc(headline, desc, maxlen)
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
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127 char *headline;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
128 u_char *desc;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
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129 unsigned maxlen;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
130 {
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
131 u_char *sp, *endp;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
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132 unsigned uni;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
133
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
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parents: 90
diff changeset
134 if (desc[0] < 2 || desc[0] > maxlen || desc[0] & 1 || desc[1] != 0x03) {
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
135 printf("%s INVALID\n", headline);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
136 return;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
137 }
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
138 printf("%s \"", headline);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
139 endp = desc + desc[0];
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
140 for (sp = desc + 2; sp < endp; sp += 2) {
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
141 uni = sp[0] | (sp[1] << 8);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
142 if (uni < 0x20 || uni > 0x7E) {
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
143 printf("\\u%04X", uni);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
144 continue;
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
145 }
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
146 if (uni == '"' || uni == '\\')
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
147 putchar('\\');
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
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diff changeset
148 putchar(uni);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
149 }
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
150 putchar('"');
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
151 putchar('\n');
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
152 }
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
153
85
0787525a33e2 cp2102-decode-ee-desc program started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 main(argc, argv)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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155 char **argv;
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 if (argc != 2) {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 fprintf(stderr, "usage: %s ihex-file\n", argv[0]);
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parents:
diff changeset
159 exit(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 }
0787525a33e2 cp2102-decode-ee-desc program started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 read_intel_hex(argv[1]);
0787525a33e2 cp2102-decode-ee-desc program started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 printf("USB device descriptor at 0x3988:\n");
87
4393e1b4b245 cp2102-decode-ee-desc: decode config descriptor
Mychaela Falconia <falcon@freecalypso.org>
parents: 86
diff changeset
163 print_device_desc(eeprom + 0x388);
4393e1b4b245 cp2102-decode-ee-desc: decode config descriptor
Mychaela Falconia <falcon@freecalypso.org>
parents: 86
diff changeset
164 printf("USB configuration descriptor at 0x399A:\n");
4393e1b4b245 cp2102-decode-ee-desc: decode config descriptor
Mychaela Falconia <falcon@freecalypso.org>
parents: 86
diff changeset
165 print_config_desc(eeprom + 0x39A);
88
ea7b411aad27 cp2102-decode-ee-desc: decode interface descriptor
Mychaela Falconia <falcon@freecalypso.org>
parents: 87
diff changeset
166 printf("USB interface descriptor at 0x39A3:\n");
ea7b411aad27 cp2102-decode-ee-desc: decode interface descriptor
Mychaela Falconia <falcon@freecalypso.org>
parents: 87
diff changeset
167 print_interf_desc(eeprom + 0x3A3);
89
cddf60418f98 cp2102-decode-ee-desc: decode endpoint descriptors
Mychaela Falconia <falcon@freecalypso.org>
parents: 88
diff changeset
168 printf("USB endpoint descriptor at 0x39AC:\n");
cddf60418f98 cp2102-decode-ee-desc: decode endpoint descriptors
Mychaela Falconia <falcon@freecalypso.org>
parents: 88
diff changeset
169 print_endpoint_desc(eeprom + 0x3AC);
cddf60418f98 cp2102-decode-ee-desc: decode endpoint descriptors
Mychaela Falconia <falcon@freecalypso.org>
parents: 88
diff changeset
170 printf("USB endpoint descriptor at 0x39B3:\n");
cddf60418f98 cp2102-decode-ee-desc: decode endpoint descriptors
Mychaela Falconia <falcon@freecalypso.org>
parents: 88
diff changeset
171 print_endpoint_desc(eeprom + 0x3B3);
90
3bde280f0986 cp2102-decode-ee-desc: decode string descriptor 0
Mychaela Falconia <falcon@freecalypso.org>
parents: 89
diff changeset
172 printf("USB string descriptor 0 at 0x3800:\n");
3bde280f0986 cp2102-decode-ee-desc: decode string descriptor 0
Mychaela Falconia <falcon@freecalypso.org>
parents: 89
diff changeset
173 print_string_desc_0(eeprom + 0x200);
91
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
174 print_string_desc("Manuf string: ", eeprom + 0x3C3, 60);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
175 print_string_desc("Product string:", eeprom + 0x208, 254);
f4a7ac90cf39 cp2102-decode-ee-desc: decode textual ID strings
Mychaela Falconia <falcon@freecalypso.org>
parents: 90
diff changeset
176 print_string_desc("Serial# string:", eeprom + 0x307, 128);
85
0787525a33e2 cp2102-decode-ee-desc program started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 exit(0);
0787525a33e2 cp2102-decode-ee-desc program started
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 }