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   1 /*
   2  * Copyright © 2013 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 #include <string.h>
  20 #include <stdlib.h>
  21 #include "ao-editaltos.h"
  22
  23 struct ao_sym ao_symbols[] = {
  24         {
  25                 .name = "ao_romconfig_version",
  26                 .required = 1
  27         },
  28         {
  29                 .name = "ao_romconfig_check",
  30                 .required = 1
  31         },
  32         {
  33                 .name = "ao_serial_number",
  34                 .required = 1
  35         },
  36         {
  37                 .name = "ao_radio_cal",
  38                 .required = 0
  39         },
  40         {
  41                 .name = "ao_usb_descriptors",
  42                 .required = 0
  43         },
  44 };
  45
  46 #define NUM_SYMBOLS             5
  47
  48 int ao_num_symbols = NUM_SYMBOLS;
  49
  50 /*
  51  * Edit the to-be-written memory block
  52  */
  53 static bool
  54 rewrite(struct ao_hex_image *load, unsigned address, uint8_t *data, int length)
  55 {
  56         int             i;
  57
  58         if (address < load->address || load->address + load->length < address + length)
  59                 return false;
  60
  61         printf("rewrite %04x:", address);
  62         for (i = 0; i < length; i++)
  63                 printf (" %02x", load->data[address - load->address + i]);
  64         printf(" ->");
  65         for (i = 0; i < length; i++)
  66                 printf (" %02x", data[i]);
  67         printf("\n");
  68         memcpy(load->data + address - load->address, data, length);
  69         return true;
  70 }
  71
  72 /*
  73  * Find the symbols needed to correctly load the program
  74  */
  75
  76 bool
  77 ao_editaltos_find_symbols(struct ao_sym *file_symbols, int num_file_symbols,
  78                           struct ao_sym *symbols, int num_symbols)
  79 {
  80         int     f, s;
  81
  82         for (f = 0; f < num_file_symbols; f++) {
  83                 for (s = 0; s < num_symbols; s++) {
  84                         if (strcmp(symbols[s].name, file_symbols[f].name) == 0) {
  85                                 symbols[s].addr = file_symbols[f].addr;
  86                                 symbols[s].found = true;
  87                         }
  88                 }
  89         }
  90         for (s = 0; s < num_symbols; s++)
  91                 if (!symbols[s].found && symbols[s].required)
  92                         return false;
  93         return true;
  94 }
  95
  96 bool
  97 ao_editaltos(struct ao_hex_image *image,
  98              uint16_t serial,
  99              uint32_t cal)
 100 {
 101         uint8_t                 *serial_ucs2;
 102         int                     serial_ucs2_len;
 103         uint8_t                 serial_int[2];
 104         unsigned int            s;
 105         int                     i;
 106         int                     string_num;
 107         uint8_t                 cal_int[4];
 108
 109         /* Write the config values into the flash image
 110          */
 111
 112         serial_int[0] = serial & 0xff;
 113         serial_int[1] = (serial >> 8) & 0xff;
 114
 115         if (!rewrite(image, AO_SERIAL_NUMBER, serial_int, sizeof (serial_int))) {
 116                 fprintf(stderr, "Cannot rewrite serial integer at %08x\n",
 117                         AO_SERIAL_NUMBER);
 118                 return false;
 119         }
 120
 121         if (AO_USB_DESCRIPTORS) {
 122                 uint32_t        usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 123                 string_num = 0;
 124
 125                 while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 126                         if (image->data[usb_descriptors+1] == AO_USB_DESC_STRING) {
 127                                 ++string_num;
 128                                 if (string_num == 4)
 129                                         break;
 130                         }
 131                         usb_descriptors += image->data[usb_descriptors];
 132                 }
 133                 if (usb_descriptors >= image->length || image->data[usb_descriptors] == 0 ) {
 134                         fprintf(stderr, "Cannot rewrite serial string at %08x\n", AO_USB_DESCRIPTORS);
 135                         return false;
 136                 }
 137
 138                 serial_ucs2_len = image->data[usb_descriptors] - 2;
 139                 serial_ucs2 = malloc(serial_ucs2_len);
 140                 if (!serial_ucs2) {
 141                         fprintf(stderr, "Malloc(%d) failed\n", serial_ucs2_len);
 142                         return false;
 143                 }
 144                 s = serial;
 145                 for (i = serial_ucs2_len / 2; i; i--) {
 146                         serial_ucs2[i * 2 - 1] = 0;
 147                         serial_ucs2[i * 2 - 2] = (s % 10) + '0';
 148                         s /= 10;
 149                 }
 150                 if (!rewrite(image, usb_descriptors + 2 + image->address, serial_ucs2, serial_ucs2_len)) {
 151                         fprintf (stderr, "Cannot rewrite USB descriptor at %08x\n", AO_USB_DESCRIPTORS);
 152                         return false;
 153                 }
 154         }
 155
 156         if (cal && AO_RADIO_CAL) {
 157                 cal_int[0] = cal & 0xff;
 158                 cal_int[1] = (cal >> 8) & 0xff;
 159                 cal_int[2] = (cal >> 16) & 0xff;
 160                 cal_int[3] = (cal >> 24) & 0xff;
 161
 162                 if (!rewrite(image, AO_RADIO_CAL, cal_int, sizeof (cal_int))) {
 163                         fprintf(stderr, "Cannot rewrite radio calibration at %08x\n", AO_RADIO_CAL);
 164                         return false;
 165                 }
 166         }
 167         return true;
 168 }