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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         [AO_ROMCONFIG_VERSION_INDEX] = {
  25                 .name = "ao_romconfig_version",
  26                 .required = 1
  27         },
  28         [AO_ROMCONFIG_CHECK_INDEX] = {
  29                 .name = "ao_romconfig_check",
  30                 .required = 1
  31         },
  32         [AO_SERIAL_NUMBER_INDEX] = {
  33                 .name = "ao_serial_number",
  34                 .required = 1
  35         },
  36         [AO_RADIO_CAL_INDEX] = {
  37                 .name = "ao_radio_cal",
  38                 .required = 0
  39         },
  40         [AO_USB_DESCRIPTORS_INDEX] = {
  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         memcpy(load->data + address - load->address, data, length);
  62         return true;
  63 }
  64
  65 /*
  66  * Find the symbols needed to correctly load the program
  67  */
  68
  69 bool
  70 ao_editaltos_find_symbols(struct ao_sym *file_symbols, int num_file_symbols,
  71                           struct ao_sym *symbols, int num_symbols)
  72 {
  73         int     f, s;
  74
  75         for (f = 0; f < num_file_symbols; f++) {
  76                 for (s = 0; s < num_symbols; s++) {
  77                         if (strcmp(symbols[s].name, file_symbols[f].name) == 0) {
  78                                 symbols[s].addr = file_symbols[f].addr;
  79                                 symbols[s].found = true;
  80                         }
  81                 }
  82         }
  83         for (s = 0; s < num_symbols; s++)
  84                 if (!symbols[s].found && symbols[s].required)
  85                         return false;
  86         return true;
  87 }
  88
  89 bool
  90 ao_editaltos(struct ao_hex_image *image,
  91              uint16_t serial,
  92              uint32_t cal)
  93 {
  94         uint8_t                 *serial_ucs2;
  95         int                     serial_ucs2_len;
  96         uint8_t                 serial_int[2];
  97         unsigned int            s;
  98         int                     i;
  99         int                     string_num;
 100         uint8_t                 cal_int[4];
 101
 102         /* Write the config values into the flash image
 103          */
 104
 105         serial_int[0] = serial & 0xff;
 106         serial_int[1] = (serial >> 8) & 0xff;
 107
 108         if (!rewrite(image, AO_SERIAL_NUMBER, serial_int, sizeof (serial_int))) {
 109                 fprintf(stderr, "Cannot rewrite serial integer at %08x\n",
 110                         AO_SERIAL_NUMBER);
 111                 return false;
 112         }
 113
 114         if (AO_USB_DESCRIPTORS) {
 115                 uint32_t        usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 116                 string_num = 0;
 117
 118                 while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 119                         if (image->data[usb_descriptors+1] == AO_USB_DESC_STRING) {
 120                                 ++string_num;
 121                                 if (string_num == 4)
 122                                         break;
 123                         }
 124                         usb_descriptors += image->data[usb_descriptors];
 125                 }
 126                 if (usb_descriptors >= image->length || image->data[usb_descriptors] == 0 ) {
 127                         fprintf(stderr, "Cannot rewrite serial string at %08x\n", AO_USB_DESCRIPTORS);
 128                         return false;
 129                 }
 130
 131                 serial_ucs2_len = image->data[usb_descriptors] - 2;
 132                 serial_ucs2 = malloc(serial_ucs2_len);
 133                 if (!serial_ucs2) {
 134                         fprintf(stderr, "Malloc(%d) failed\n", serial_ucs2_len);
 135                         return false;
 136                 }
 137                 s = serial;
 138                 for (i = serial_ucs2_len / 2; i; i--) {
 139                         serial_ucs2[i * 2 - 1] = 0;
 140                         serial_ucs2[i * 2 - 2] = (s % 10) + '0';
 141                         s /= 10;
 142                 }
 143                 if (!rewrite(image, usb_descriptors + 2 + image->address, serial_ucs2, serial_ucs2_len)) {
 144                         fprintf (stderr, "Cannot rewrite USB descriptor at %08x\n", AO_USB_DESCRIPTORS);
 145                         return false;
 146                 }
 147         }
 148
 149         if (cal && AO_RADIO_CAL) {
 150                 cal_int[0] = cal & 0xff;
 151                 cal_int[1] = (cal >> 8) & 0xff;
 152                 cal_int[2] = (cal >> 16) & 0xff;
 153                 cal_int[3] = (cal >> 24) & 0xff;
 154
 155                 if (!rewrite(image, AO_RADIO_CAL, cal_int, sizeof (cal_int))) {
 156                         fprintf(stderr, "Cannot rewrite radio calibration at %08x\n", AO_RADIO_CAL);
 157                         return false;
 158                 }
 159         }
 160         return true;
 161 }
 162
 163 static uint16_t
 164 read_le16(uint8_t *src)
 165 {
 166         return (uint16_t) src[0] | ((uint16_t) src[1] << 8);
 167 }
 168
 169 bool
 170 ao_heximage_usb_id(struct ao_hex_image *image, struct ao_usb_id *id)
 171 {
 172         uint32_t        usb_descriptors;
 173
 174         if (!AO_USB_DESCRIPTORS)
 175                 return false;
 176         usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 177
 178         while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 179                 if (image->data[usb_descriptors+1] == AO_USB_DESC_DEVICE) {
 180                         break;
 181                 }
 182                 usb_descriptors += image->data[usb_descriptors];
 183         }
 184
 185         /*
 186          * check to make sure there's at least 0x12 (size of a USB
 187          * device descriptor) available
 188          */
 189         if (usb_descriptors >= image->length || image->data[usb_descriptors] != 0x12)
 190                 return false;
 191
 192         id->vid = read_le16(image->data + usb_descriptors + 8);
 193         id->pid = read_le16(image->data + usb_descriptors + 10);
 194
 195         return true;
 196 }
 197
 198 uint16_t *
 199 ao_heximage_usb_product(struct ao_hex_image *image)
 200 {
 201         uint32_t        usb_descriptors;
 202         int             string_num;
 203         uint16_t        *product;
 204         uint8_t         product_len;
 205
 206         if (!AO_USB_DESCRIPTORS)
 207                 return NULL;
 208         usb_descriptors = AO_USB_DESCRIPTORS - image->address;
 209
 210         string_num = 0;
 211         while (image->data[usb_descriptors] != 0 && usb_descriptors < image->length) {
 212                 if (image->data[usb_descriptors+1] == AO_USB_DESC_STRING) {
 213                         ++string_num;
 214                         if (string_num == 3)
 215                                 break;
 216                 }
 217                 usb_descriptors += image->data[usb_descriptors];
 218         }
 219
 220         /*
 221          * check to make sure there's at least 0x12 (size of a USB
 222          * device descriptor) available
 223          */
 224         if (usb_descriptors >= image->length || image->data[usb_descriptors] == 0)
 225                 return NULL;
 226
 227         product_len = image->data[usb_descriptors] - 2;
 228
 229         if (usb_descriptors < product_len + 2)
 230                 return NULL;
 231
 232         product = malloc (product_len + 2);
 233         if (!product)
 234                 return NULL;
 235
 236         memcpy(product, image->data + usb_descriptors + 2, product_len);
 237         product[product_len/2] = 0;
 238         return product;
 239 }